Although they have a BSL-4 facility, the WIV lab was also doing bat coronavirus research in their BSL-2 and BSL-3 facilities through 2019 [0]. The odds of leaks

Although they have a BSL-4 facility, the WIV lab was also doing bat coronavirus research in their BSL-2 and BSL-3 facilities through 2019 [0]. The odds of leaks from those facilities are not as low. [0] https://en.wikipedia.org/wiki/Wuhan_Institute_of_Virology#SARS-related_coronaviruses https://en.wikipedia.org/wiki/Wuhan_Institute_of_Virology#SA...