In the US, right? Well, that does not prevent the states, if the elected representatives cared for what they did and the future of their country and fellow citizens, to impose a rulling stating that, unless medically attested for an impediment from health reasons, no child can enroll in any school, unless properly and fully vaccinated.

Paring this with the legal obligation to enroll every single child in school and making it a criminal offense if not observed by parents/guardians, would make minds change.

But the entire country would have to pass a centralized registration obligation of every single child, in order to be recognized as a citizen and, again, make it a crime if parents do not comply.

Hey, if my backwater country managed to do this in the 50's and earlier, it should not be that much of a challenge to the mighty and modern US.