The Covid-19 "vaccine" does NOT protect from infection.  It is non-sterilizing.  Therefore, there is no reason to add it to the requirements.  It does nothing to prevent disease transmission and has no place in public health for school children.  Children are barely affected by Covid-19 disease; no healthy child has ever died from it.  The Covid-19 "vaccine" has a very high rate of harm, especially in children for myocarditis, in particular, and it contains toxins that spread throughout the body (spike protein, lipid nanoparticles, PEG) harming organs and the immune system.  And mostly, like the unrequired flu shot, the Covid-19 "vaccine" is a constant mismatch with circulating variants.  Any current version of it is out-of-date, or mismatched, as soon as it is available.