These vaccines are not ordinary vaccines.  They are designed to make each person's body manufacture spike proteins in order to teach the body what they look like and learn to fight against them.  This technique has never been used before on a large scale human population and it is highly experimental. 
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No administrator should assume the level of risk that is associated with these gene therapy injections.  There is a reason why the pharmaceutical companies have been exempted from liability for adverse consequences from these injections, and that is because they are experimental  Long term effects such as infertility have not had sufficient time to be evaluated yet. 
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It's one thing for a school board to encourage and facilitate these injections.  It is quite another for a school board to mandate these injections in order to attend school.  That step will leave the decision makers liable personally as well as organizationally for any adverse consequences. 
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In any case, some people such as myself find that a technique that uses research based upon aborted fetal tissue, and then intentionally modifies the way that the body functions on a genetic level is contrary to how God intended us to live.  People with such religious objections should not be forced to take the injection any more than those who are advised to avoid the injections for health reasons.  A right to religious accommodation ought to be recognized and upheld.