Thimerosal Does Not Cause Autism
jamie found an article over at Washington Monthly discussing the recent finding that there is no link between thimerosal and autism. It seems that after the mercury-based vaccine preservative was withdrawn from use in 1999, no drop in autism rates has been observed in a large California study. Here's the Science Daily writeup on the study, published in the Archives of General Psychiatry.
After all, other countries have eliminated or dramatically reduced mercury in vaccines with zero effect on autism rates, and the mercury fanatics never batted an eye. Nor are they troubled by the fact that the neurological effects of actual mercury poisoning don't resemble autism.
It's a bit like homeopathy in reverse. Many of these guys have a superstitious fear of "toxins," and no matter how low the level might be, they will be convinced that it is poisoning their kids.
Of course, the real problem is that the age at which autism symptoms develop is about the same as the age when kids normally get their shots. A reasoned explanation of the difference between correlation and causality is often beyond the grasp of parents who are desperate for an explanation, or better yet, somebody to blame.