I almost became an anti-vaxxer when my now 15-year-old was a baby. What draws you in is fear because no one explains how vaccines work in simple terms...they're just some juice you get a shot of that keeps you from getting sick.
C-Span very recently aired some great videos on the history of vaccines. One was called, "Smallpox and the First Vaccine," but they had more than one video, and the title of that one, I'm not sure how to say here, but the content is broader than the title suggests.
A VERY BRIEF and summarized history:
The history of vaccines, and concerns about vaccines, date back to the origin of vaccines. Variolation was the precursor to the first vaccine. Variolation was - as far as I know- specifically a way to combat smallpox. There were a few parts to the idea:
1. Smallpox was very common.
2. Overall, about 1/3 of people did not survive smallpox, but there was variation between smallpox outbreaks. Some outbreaks had a higher survival rate, and some had a lower survival rate.
3. If a person survived smallpox, they generally couldn't get it a second time.
The basic idea of variolation was to inoculate people from smallpox by intentionally exposing them to a mild case of smallpox. The idea worked, but it came with some very real risk.
1. Variolation could trigger an unnecessary outbreak of smallpox.
2. Some variolation patients died.
3. I'm not quite sure how to explain #3- but in that time period, every cut was risky, because there was no good way to curb infections. One variolation/early vaccine concern stemmed from a concern that variolation not only gave the person smallpox, but it also corrupted a person's bloodstream. People thought it was a bad idea to put bad things into our bodies, just as some people now only want to eat healthy foods.
During the American Revolution (Boston 1775), Washington's army was nearly wiped out by a smallpox outbreak. British troops fared better because they had been inoculated. Washington quickly realized smallpox could be used as a weapon. In 1777, Washington mandated variolation of his troops.
The current debate is very old and very connected to the history of this country. I found the film very interesting.