Vaccination should be mandatory. (unless the child has some major known allergy, of course.) Unvaccinated children should not be allowed in public schools, they are a risk to others. The-usually small-negative affects of vaccinations don’t outweigh the plentiful benefits of getting immunized. Plus, many reasons people are against vaccinations are believing in pseudoscience and/or poorly researched claims. I’d rather my child have autism than say the measles (although the study trying to link autism was poorly done and not peer reviewed.) We are so lucky to be living in a time where vaccinations are readily available. Anti-vaxxers are a threat to us all.