I can think of none.
Seems like 'COVID19' is the new code-word that instantly validates whatever tyrannical edict that pops into these creature's heads.
This may be the precursor to the biblical Mark of the Beast
Depends on the job. Healthcare workers, particularly those who work in hospitals, are required to be up to date on all their vaccinations as a condition of employment. Teachers and school staff as well in most places. There are some other examples, but I think those are probably the largest.
A lot of it comes back to limiting liability. If they don’t require it and someone gets seriously ill or dies, that’s a massive civil liability sitting out there for them.
Is there any other malady for which not having taken a vaccine for is grounds for termination?