Get this in writing in an email from your manager.

Definitely look for another job, if you are in a medical field as far as I can tell they are hurting bad for staff so getting a new job shouldn’t be to hard. You don’t have to take it but it might be good to see what’s out there.

COVID twice is not excessive, this guy is an asshole and this is likely illegal. At a min consult OSHA and then alert HR.