WHO, however, also said it did not have access to all the necessary information.
November 2019 is in line with when experts believe the COVID-19 virus began circulating.
He added that the USA government is working with the World Health Organization and other member states to support an assessment The origins of the epidemic Led by experts "free from interference or politicization". Covid-19 was a common seasonal disease.
Several U.S. officials described the intelligence as "circumstantial", worthy of further exploration but not conclusive on its own. "Everything about the stepwise evolution over time strongly indicates that [this virus] evolved in nature and then jumped species", Fauci said at the time in an interview with National Geographic.
"It's not a complete abandonment of that hypothesis", Dazak said. Perhaps a year ago, that kind of scenario because it was a more likely scenario.
Despite this assertion, numerous western governments, including the United States, Norway, Canada and Britain, have all expressed concerns about the validity of the WHO-led study and China's reluctance to disclose data from the early days of the pandemic.
Members of the House Foreign Affairs Committee, who have been investigating the cause of the pandemic for a long time, received a confidential briefing on the issue last week, according to sources familiar with the issue. Intelligence reporting about possible November infections among Wuhan Institute employees "can't be dismissed" by US researchers, the source added. Chinese officials have suggested the virus did not originate in Wuhan and might have even entered China from another country via imported frozen food shipments or wildlife trading, without offering any credible evidence for the claim.
"Sen. Paul, with all due respect, you are entirely, entirely and completely incorrect ... the NIH has not ever and does not now fund gain of function research in the Wuhan Institute", Fauci stated.
The Central Intelligence Agency, National Security Agency and defense intelligence components contributed to both the public fact sheet and classified report, the sources said.
"Do you think it's possible that COVID-19 arose from a lab accident ... in Wuhan, and should it be fully investigated?"
That must change. Increasingly, scientists are taking the lab-leak hypothesis seriously.
China has consistently denied that the coronavirus escaped from a lab. It added that this "raises questions about the credibility of Shi Zhengli, the top bat coronavirus expert at WIV, who said the leak didn't come from her laboratories".
Members of the House Foreign Affairs Committee, which has always been investigating the origins of the pandemic, received a classified briefing on the matter last week, according to a source familiar with the matter.
The photo from 2020 shows the exterior of the Wuhan Institute.