American schools will not accept a child until their shot record is up to date
If things have changed since then, I don't know about it ... and even if they have ... the greater majority of American kids have been vaccinated, IF for no other reason than that they're required and for many (welfare types) absolutely free
ESPECIALLY measles.
WE HAD, FOR ALL PRACTICLE PURPOSES ERADICATED IT
So what changed ... ?
illegals
period
Apparently, unless a parent signs an exemption, which is a waiver so that they have to keep their unvaccinated kids at home if a known measles outbreak has occurred at the school. That’s Pennsylvania rules. But otherwise, you are right, we have the issue largely under control.
You can get vaccination waivers in most states for religious reasons or medical reasons.
Mexico has a vaccination rate of 89% and the US has a vaccination rate of 91%. Neither rates are high enough to sustain herd immunity, and those numbers provide no evidence that the disease has been introduced or spread by illegal aliens.