To each thy own.

Measles, Polio, Whooping Cough- contagious even hours after infected person has left the room, decades of research for their vaccines, herd immunity protects those unable to receive vaccine, mandatory vaccination for some few places such hospitals but not nursing homes or public schools. Unvaccinated aren't required to take any precautions in public.

Flu, Hepatitis- Hepatitis contagious even days after infected has left the room, 1918 Flu Pandemic. A couple decades of vaccine research. Flu vaccines may or may not give protection due to mutating factors. Vaccine not mandatory, though highly suggested, in most workplace or school settings. Unvaccinated may be required to wear a mask at work but no public policies.

Covid19- contagious and mutating. Vaccine research is new, barely over a year old. Vaccine may or may not give protection due to mutating factors. Many people and governments pushing for vaccination to be mandatory.

My body, my choice. Your body, your choice.