Via the Substack-based site Public, an article by Michael Shellenberger, Matt Taibbi, and Alex Gutentag reports:
Sources within the US government say that three of the earliest people to become infected with SARS-CoV-2 were Ben Hu, Yu Ping, and Yan Zhu. All were members of the Wuhan lab suspected to have leaked the pandemic virus.
As such, not only do we know there were WIV scientists who had developed COVID-19-like illnesses in November 2019, but also that they were working with the closest relatives of SARS-CoV-2, and inserting gain-of-function features unique to it.