Yeah, but seeing your own kid (or even other kids) suffer has got to have some effect. Or at least I hope it does.
Hasn't worked so far. It is bizarre dissonance that says polio is a price worth paying, but it seems that the attitude of "my way even if it kills us" is become prevalent at the moment. I could point to other issues that follow this pattern.
I don't know why it has gotten worse. Is there something in the water? The air? Vaccines?
A comment that got to me recently, IIRC from an Aussie stand-up comedian, was along the lines of, "Stop saying that you'd prefer your child to be dead than to have autism."
But another interesting thing I've noticed is how people from completely different backgrounds can come to the same (kooky) position by very different paths.
For example I'd long considered that anti-vax attitudes were strongest in people of a left-wing, green/hippy persuasion. Only, reading an article on Breitbart showed similar popularity of anti-vaxism among the alt-right too. The first group develop it from their love of nature and dislike of all those nasty chemicals. But the second group appear to be anti-vax because they dislike medical corporatism, embrace rugged individualism and want to Stick It To The Man.
The first example I found was how those people of a left-wing, green/hippy persuasion, and socially conservative pentecostal Christians, shared a strong interest in "natural foods" and a dislike of additives.