That we have our own problems with the anti-vaccine crowd is obvious enough. Those who fail to understand what a bitch Mother Nature is, how she and evolution want to eat your children. Thus they decry vaccines as unnatural and wish to leave their children to the deaths that so many before them suffered:
In the past, our ancestors were subjected to full-strength, undiluted, CFC-free, pure-organic, additive-free natural selection. The biggest recipients were young children, for which evolution had the greatest appetite of all.