Here's the thing about the anti-vax movement: even in the outside chance that vaccines do in fact cause autism, a slight increase in the autism rate is worth eliminating polio for.
It's one damn google search away on a shitload of multiple, reliable sources.
Of course, that only applies up to a certain point, where enough parents opt out to make vaccination individually the optimal choice. And of course, it's the right thing not to endanger the rest of the population.
Without herd immunity, benefits of vaccination strictly dominate, even if you just consider the individual.