Anyone who has doubts about vaccinations should simply ask someone like me, who lived through the 40s and 50s as a child, what it was like every summer when polio season rolled around. The fear was palpable and all parents lived in terror that their child would come down with polio. Thanks to modern vaccines polio is no longer feared every summer as it was only about 55 years ago.
There were very few vaccinations available when I was a child and most of us came down with measles, whooping cough, mumps and other diseases. We did have chicken pox vaccinations and I am glad we did. As soon as the polio vaccine came out, I made sure I was vaccinated and then again when I went into the army, was vaccinated for it.
I would encourage you to actually study the history of vaccinations. Most diseases were subsiding before a vaccination was even produced. Millions of people were exposed to disease and never affected. What was the difference? Immune systems were able to fight off disease in millions of cases. The idea to stab every kid with 20-30 direct diseases straight into the blood stream is questionable. There has to be a balance between supporting the immune system to fight disease and just jabbing every kid with needles full of disease in the believe that it will "prevent" disease.
Summer was, indeed, a very trying time for parents, until the polio vaccine came out.