Originally Posted by
BoilerUP
How would that be legal?
Yes it's legal, already been resolved WRT to other vaccines (notably flu).
ADA and religious exemptions already exist for that, so a pre-existing condition might get you out of it. However... even for those exemptions, the employer only has to make "reasonable" accommodations. In the covid context that might mean providing such a person with a separate workspace away from others, but that's not an option for crew.
I suspect that most employers will be initially reluctant to require vaccinations, but at some point if things are bad enough they will. So depends on known herd immunity and what percentage of folks voluntarily get vaccinated. An employer may perceive liability risk if they allow non-vaccinated employees to have contact with other workers and customers.
All that could be up in the air if specific laws are passed relevant to covid.