The prevalence of autism in children did not decrease after thimerosal was removed from most vaccines. Controversy persists about whether exposure to the preservative thimerosal (which contains ...

Even so, the six states' thimerosal bans remain on the books; Washington's is scheduled to go back into effect in March.

Thimerosal, or sodium ethylmercurithiosalicylate, is a preservative used in low concentrations mainly in vaccines, cosmetics, ophthalmic and otolaryngolic medications, antitoxins, topical and ...