Since the dawn of vaccination there has been a war of disinformation, propagated by both sides. The anti-vaccinationists have lied, bent statistics, invented scare stories and buried facts that undermine their case. They have committed crimes against medicine, science and humanity, and exposed millions to the dangers of preventable infections. The other side may be guilty of far less heinous crimes, but it is not blame-free. The evangelistic desire to spread the benefits of vaccines as widely as possible led pro-vaccinationists to play down the risks, giving fuel to arguments against vaccination.