6 天之前 · The CIA now believes the virus responsible for the COVID-19 pandemic most likely originated from a laboratory.

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.

4 天之前 · Since COVID-19 first took off, political leaders, infectious disease specialists, and the lay public have debated its origins. Eventually, two hypotheses emerged: Either the virus crossed over ...

1 天前 · What do the lab leak theory’s critics say? Many scientists still favour a scenario that Covid, like other coronaviruses, emerged in animals and then passed to humans.

6 天之前 · The CIA now assesses the virus that causes Covid-19 more likely originated from an accidental lab leak in China, rather than occurring naturally, according to a statement from the agency Saturday ...

4 天之前 · China says it's "extremely unlikely" that COVID-19 came from a lab, after the CIA said it believed , though with low confidence, that it did, rather than from natural transmission.

6 天之前 · The CIA said Saturday it has shifted its previous assessments and has concluded that it’s likely the Covid-19 virus was leaked from a Chinese lab before it became a global pandemic but added ...

2024年12月3日 · The committee’s 520-page report, released on 2 December, offers no new direct evidence of a lab leak, but summarizes a circumstantial case, including that the Wuhan Institute of Virology (WIV) used NIAID money to conduct “gain-of-function” studies that modified distantly related coronaviruses.

2024年6月3日 · One alarming detail — leaked to The Wall Street Journal and confirmed by current and former U.S. government officials — is that scientists on Dr. Shi’s team fell ill with Covid-like symptoms ...

6 天之前 · A new analysis that began under the Biden administration is released by the C.I.A.’s new director, John Ratcliffe, who wants the agency to get “off the sidelines” in the debate.