Well you can have a situation where someone cannot take the vaccine because of adverse medical reactions and someone else who does not take does not take the va

Well you can have a situation where someone cannot take the vaccine because of adverse medical reactions and someone else who does not take does not take the vaccine objecting for personal reasons working at the same place of employment. Suppose the first one is already hired, and the second one comes in as a new hire. Does the first one now have grounds to litigate because their workplace is now potentially unsafe for them to work in through no fault of their own? What about the reverse situation? Does the employer not hire an otherwise capable employee because of a health reason that they have no control over?