As its representatives noted, there is not much time left to solve this problem. WHO will assemble a team of 20 people, including specialists in biosecurity and laboratory safety, as well as experts on animal diseases.
The previous international group of scientists worked in China from January to February. They visited the Wuhan Institute of Virology, including the BSL-4 laboratory, which was associated with rumors of a virus leak, a hospital, the Huanan seafood market, as well as the Center for Disease Control and Prevention.
According to the final report, SARS-CoV-2 was most likely transmitted to humans from bats through another animal: similar pathogens were found in pangolins, indicating interspecific transmission. However, the head of the WHO, Tedros Adhanom Ghebreyesus, called for further investigation of the version about the laboratory leak, as experts have not found the source of the virus.
In early August, Republicans from the U.S. House of Representatives published a report in which they concluded that the virus originated in a laboratory in Wuhan. At the same time, they were based on data from open sources and indirect evidence.
Experts from the Chinese Center for Disease Control and Prevention (CDC), in turn, suggested that the coronavirus could have been brought to Wuhan on frozen food packages. The WHO working group members put forward the same hypothesis, but they did not prioritize it.