There have always been exceptions made for vaccine refusal in schools - until 2021 Marin County CA had one of the lowest vaccination rates in the country, and students got exemptions.

Also, the vaccines that have been traditionally required for school are proven to “work” in the sense that they immunize one against the disease, thus eliminating spread.

The COVID vaccines don’t do that. Most people who get COVID these days are vaccinated, and they still spread it.