Its not just that mandatory medical treatments are ethically fraught (but not unheard of. Mental health is the most obvious example, but there are also mechanis

Its not just that mandatory medical treatments are ethically fraught (but not unheard of. Mental health is the most obvious example, but there are also mechanisms to force treatment on non consenting minors with their gaurdian's approval). The other reason we didn't have mandatory vaccinations is that there was just no need. Vaccines are about as close to a miracle drug as you can get. With virtual no side effects, a 1 minute procedure makes you immune to illness that would previously have devastated society. If you took vaccines back in time and told people what they did, but claimed the had every side effect they are accused of having, there would still have been lines out the door.