Oh. My. God.

The people I thought were wingnuts -- the hysterical vaccines-cause-autism writers on the medical newsgroups I read in the late 1990s - were RIGHT.
And the coverup has been going on for years.
Robert Kennedy writes in Salon that there is credible and substantive evidence that the explosion in childhood autism. as well as in speech delays, ADD and hyperactivity, is being caused by a mercury-based preservative used in childhood vaccines. The preservative is particularly devastating to brain development in infants and small children. Since 1991, when the CDC and the FDA had recommended that three additional vaccines laced with the preservative be given to extremely young infants -- in one case, within hours of birth -- the estimated number of cases of autism had increased fifteenfold, from one in every 2,500 children to one in 166 children.
The link between neurological disorders and this ingredient has been suspected in the past, but the studies cited were ones which did not show links. The ones that did, as described in this article, were suppressed.
And it isn't even a necessary ingredient for the vaccine itself. Single-dose vaccines don't use this preservative, but the cheaper multiple-dose vaccine packaging needs a preservative to prevent contamination from multiple needles.
Read the article -- Deadly immunity -- and weep.