If you are not a JW or 7DA, it is mandatory, unless you choose to lie.
The fact that there are exemptions does not negate there is a legal mandate. My statement stands.
Stand on this link. I used this very form when the schools tried to force hepatitis B vaccinations on my sons.
The JW’s reversed their antivaccination doctrine (As well as many other doctrines) in the 1960’s. I’m not sure about the Seventh Day’s.