PREP Act gives them immunity under a medical state of emergency which I'm pretty sure Trump declared to be able to block travel from china and also for warp speed. I don't know if biden has rescinded it or not. Probably not because it gives him more power and the vax makers are still protected. https://en.wikipedia.org/wiki/PREP_Act First paragraph
I ain't no test monkey. I'm a horse.
FYI, you can change identities on an hourly basis. Be your authentic self!