The virus most likely leaked from the gain-of-function experiments that they were doing under BSL-2 and not from the BSL-3 or BSL-4 labs.
Third scenario: bat-to-researcher transmission during field work at bat caves or from the bat repository/colony or unaltered bat viruses at the labs in Wuhan.
Third scenario: bat-to-researcher transmission during field work at bat caves or from the bat repository/colony or unaltered bat viruses at the labs in Wuhan.
https://www.nytimes.com/2021/06/25/opinion/coronavirus-lab.html