Many parents, politicians and some researchers cite a [[mercury]] preservative used in vaccines, thimerosol, as the cause of injury in many recipients, including a cause of increase in autism rates. Thimerosol is a inorganic form of mercury that has widely been used as a vaccine preservative, and still is despite widespread calls for its removal. Most of the influenza vaccines contain thimerosal equivalent to 25 micrograms of toxic [[mercury]], an amount that would be safe under [[EPA]] limits only if the recipient weighs 550 pounds. | Many parents, politicians and some researchers cite a [[mercury]] preservative used in vaccines, thimerosol, as the cause of injury in many recipients, including a cause of increase in autism rates. Thimerosol is a inorganic form of mercury that has widely been used as a vaccine preservative, and still is despite widespread calls for its removal. Most of the influenza vaccines contain thimerosal equivalent to 25 micrograms of toxic [[mercury]], an amount that would be safe under [[EPA]] limits only if the recipient weighs 550 pounds. |