> Before 2020, the rules followed by virologists in China and elsewhere required that experiments with the SARS1 and MERS viruses be conducted in BSL3 conditions. But all other bat coronaviruses could be studied in BSL2, the next level down. BSL2 requires taking fairly minimal safety precautions, such as wearing lab coats and gloves, not sucking up liquids in a pipette, and putting up biohazard warning signs. Yet a gain-of-function experiment conducted in BSL2 might produce an agent more infectious than either SARS1 or MERS. And if it did, then lab workers would stand a high chance of infection, especially if unvaccinated. Much of Shi [Zheng-li, head researcher at WIV]’s work on gain-of-function in coronaviruses was performed at the BSL2 safety level, as is stated in her publications and other documents. She has said in an interview with Science magazine that “[t]he coronavirus research in our laboratory is conducted in BSL-2 or BSL-3 laboratories.”
https://thebulletin.org/2021/05/the-origin-of-covid-did-peop...
WIV has acknowledged that at least some of their bat coronavirus research was conducted in their BSL-2 labs which have a far, far lower level of security.
On the other hand, the WIV has recently published papers about creating new coronaviruses by combining a gene from one virus with the rest of another virus, as well as other types of modifications to existing coronaviruses. They have active grants to continue with this type of research. They also have acknowledged performing this work in BSL-2 labs, which would not be secure enough to contain SARS-CoV-2 if it were to have been the result of one of these experiments.