Comment Re:Autism (Score 5, Informative) 1007
Read up on herd immunity. A large part of the effectiveness of vaccines is that beyond the individual protection they confer on most recipients, they also protect the unvaccinated and the ones that the vaccine wasn't effective for if the overall rate of vaccination is high enough.
That's why the people who choose not to vaccinate their kids are also increasing the risk for the kids that did get the vaccine but for whom it wasn't effective for some reason, the kids that haven't been vaccinated yet because they're too young, and the kids that for some reason - e.g. compromised immune system - can't get the vaccine at all.