Facts that are indisputable:
1.) SmallPox was eradicated world wide when people started being vaccinated against it
2.) Polio has been eradicated from the USA when people started being vaccinated against it
3.) Diphtheria has been eradicated from the USA when people started being vaccinated against it
4.) Occurrences of Hepatitis A are down 91% in the USA since people started being vaccinated against it
5.) Occurrences of Measles are down 99% in the USA since people started being vaccinated against it
6.) Occurrences of Mumps are down 99% in USA since people started being vaccinated against it
7.) Occurrences of Pertussis are down 93% in the USA since people started vaccinating against it
There are another 6 I could list off the top of my head but am too lazy to write now. Debating if vaccines work is like debating if the world is flat. Anyone who does not believe that they work is delusional, ignorant of the facts, lying, or all of the above. Some things really are that simple.