Guest_989: Don't come to a comments board looking for much in the way of polite, considered debate.  Elsewhere however, there is a plethora of scientific evidence for the efficacy of vaccines and the effect on society if the vaccination rate falls below a certain rate, somewhere around 85%, if memory serves.

The reason that you will find disparaging and insulting comments is that this debate has been going for several years and the study that anti-vaxxers like to point to, the Wakefield study, has been thoroughly refuted.  Those who keep the debate going have zero medical or scientific expertise, such as Jim Carrey and Jenny McCarthy.  The rest, unfortunately, do fall into the conspiracy theorist camp.  Truly, there is not much credibility on the anti-vaccination side.