Is it though?
I know an employer can require such things of a new employee (ie: they enter into an agreement before getting the job) but I’m not so sure that an employer can say to a current employee that they have to have a specific medical procedure done or they are fired.
I think it’s legal to require but I’m not sure about how far they can really push it.
Also it would open the employer up to liability if the employee has a bad reaction....
I‘m not requiring my employees to take it, and considering what we do we could probably get pretty close to the front of the line (we’re exposed to the public daily in similar numbers to a grocery store worker).