This Tuesday, lawmakers in Washington heard from an 18-year-old who, against all odds, got his shots. Ethan Lindenberger, who fought with his own mother to get vaccinated, told senators, "for my mother, her love, affection, and care as a parent was used to push an agenda to create a false distress."

That "anti-vaxx" agenda, the dangerous legacy of a thoroughly debunked 1998 study in the British medical journal Lancet, was dealt yet another devastating — though not mortal — blow this week, courtesy of epidemiologists from Denmark’s Staten Serum Institute. Their new study, which included more than 650,000 children, found that the MMR vaccine did not raise the risk of developing autism. 

And yet, even in the face of study after study, and even as websites like Pinterest have moved to stamp out the spread of anti-vaxx materials on their websites, the debunked vaccine-autism link and its impact on public health live on. In this 2012 interview, Brooke spoke with Seth Mnookin, author of The Panic Virus: A True Story of Medicine, Science and Fear, about why these myths persist.