How did the idea that a mercury-based preservative (thimerosal) causes autism come to be? This timeline is the historical account of an unbelievable, but true, story. It’s the story of parents who knew something was wrong and never gave up. The story of brave scientists who told the scientific truth. And a story of unsung heroes - the child victims whose lives were devastated and forever changed by vaccines. To the heroes who have sacrificed so much: this timeline is to honor you with the hope that our nation will have a true understanding of your suffering.