Vaccinations are a young enough technology that we may find that we have to go through a few 'cycles' similar to how the atrocities of war seem to get forgotten

Vaccinations are a young enough technology that we may find that we have to go through a few 'cycles' similar to how the atrocities of war seem to get forgotten after a couple of generations. Right now the anti-vaccination crowd has the luxury of living in a world where many of the horrible maladies of yester-year are all but gone due to the herd immunities granted to us via vaccines. When they look at the risks of vaccination, they get to weigh the risk of side effects of the vaccine vs. the risk of getting sick in a world where you get to 'leech' off of everyone else's vaccination-induced immunity. Polio is rare enough in the first world, that it seems a 'solved problem' much like small pox.