All kinds of vaccines have been mandatory for generations. You wouldn't have been allowed to attend school if you hadn't had loads of them. In the US for instance all schoolchildren are required to be vaccinated against diphtheria, tetanus, pertussis, polio, varicella, measles, and rubella, and almost all states also require vaccinations against mumps and hepatitis B. So please don't act like requiring vaccination is some unprecedented erosion of personal liberty, because it just plain isn't.