Vaccines for easily transmitted serious diseases are loosely like seat belts in cars. You use them not only to protect yourself but also the others. Also in ord

Vaccines for easily transmitted serious diseases are loosely like seat belts in cars. You use them not only to protect yourself but also the others. Also in order to have any meaningful effect, they must be used from a large majority of population, therefore both are mandatory in the developed world (it seems vaccines not any more).