Why weren thimerosal-containing vaccines taken off the market?
Scientific data have not established that vaccines containing thimerosal, used as a preservative, create an imminent or substantial hazard to public health or are in violation of FDA laws or regulations, and therefore do not justify such a recall. A mandatory recall requires that the product present an imminent or substantial hazard to the public health. The U.S. FDA is responsible for voluntary and mandatory recalls of drug and vaccine products. The FDA continuously monitors the safety of these products.