In the US, (which is infamous for its absurd lawsuits), public schools have instituted "Mandatory vaccination" policies ages ago. This is the crux of my triggered-ness.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2553651/Basically, because people in the US are *ALSO* infamously fucking stupid, at least as it relates to religion and the like, exemption was permitted for bullshit reasons, while people with real reasons often got given the run-around. Again, the "We require all students to be vaccinated before they can enroll" is a bureaucrat's wet dream. It leads to the kind of situation I was mentioning, where we would have to drop doctor's orders on the fuckers *EVERY MOTHERFUCKING YEAR*, then have a day-long consultation with the school administration that -- YES-- I have not magically been given a brand new body that is no longer sensitized to the vaccine-- and thus, NO, *CANNOT TAKE IT*, and *YES*, there *IS* doctor's credentials behind this-- with the school administrations getting progressively more and more white knuckled as they have to back away from the comfort zone they have of 100% compliance with the "as written" requirements.
(which they would then promptly forget about/conveniently lose, just in time for enrollment next year.)
When I see "Mandatory vaccination", I see this bureaucratic bullshit writ large.
This is because the primary driver for such things, is legal absolvement. Specifically, the requirement is less about keeping students safe, and more about keeping various institutions absolved from legal culpability, which is why it becomes a fucking nightmare, where actually asserting the medical exemption becomes a lesson in futility, as the bureaucrats devise ever-more-onerous means of attempting to reach 100% "exactly as written on paper" compliance.
See for instance, the following "nightmare scenario"--
Student who cannot be vaccinated against measles, catches measles, and ends up spreading it at school. Angry mothers DEMAND to know why the school permitted an unvaccinated student there. School has to defend the decision to permit a student who cannot medically be vaccinated to receive an education, in the face of angry mothers who had their kids get sick, and more importantly, their bloodsucking lawyers.
If you throw into that mix actual LAWS requiring vaccinations, then you end up with it getting much much worse for the people who cannot vaccinate.