This is a good column by James Rainey in today's LA Times about Amy Wallace, who wrote a column in Wired about parental hysteria about vaccines as a cause of autism and got an onslaught of hate mail. One person wrote to her "Who does the government think it is to tell us what is best for public health?" That's like saying keep the government out of Medicare.
In case anyone still has any doubt, it is clear by now that vaccines do not cause autism, nor does the thimerosal in them cause it. After thimerosal was taken out of nearly all vaccines, autism diagnoses increased.