I am pretty sure there is a list of things that employers (in the US) can't discriminate on, and immunity to Coronavirus isn't one of them.
I think it will ultimately be in the hands of workers to decide whether or not they want to do the job. Maybe I'm immune to Coronavirus so I should work in a pharmacy... but I get paid 10x as much writing software, so I'm probably going to do that instead.
What if you’re immunocompromised with a hereditary illness? If there’s reasonable grounds it makes sense but reasonable and what employers will try and get away with are two different things.
I think it will ultimately be in the hands of workers to decide whether or not they want to do the job. Maybe I'm immune to Coronavirus so I should work in a pharmacy... but I get paid 10x as much writing software, so I'm probably going to do that instead.