Pro-vaxers love to use polio as an example, and they have a point. This is what we selective vaxers look at as a good reason to continue some vaccinations. I must point out, though, to the other vaxers posting here that not every disease vaccinated for is equivalent to polio. And at some point the routine vaccinations for smallpox were ended as well.
I think debating vaccination campaigns of the past with non-vaxers is as unimportant as asking a pacifist whether he would have fought against Hitler in WWII. It might make for a fun debate, but I don't see the relevance to the issues *right now*.