The alleged link between vaccines and autism is back in the news this week, being regularly speculated on by both President Trump and Health and Human Services secretary Robert F. Kennedy Jr.  The claim has been repeatedly disproven: there is no evidence that vaccines and autism are related. But the myth is powerful. In this episode: the roots of the modern anti-vaccine movement, and of the fears that still fuel it – from a botched polio vaccine, to the discredited autism study, to today. This episode originally published in February 2025. 

Guests:

Paul Offit, director of the Vaccine Education Center at the Children's Hospital of Philadelphia, and a professor of pediatrics at the University of Pennsylvania School of Medicine

Elena Conis, historian of medicine and public health and a professor in journalism and history at the University of California, Berkeley

Arthur Allen, senior correspondent for nonprofit KFF Health News and author of Vaccine: The Controversial Story of Medicine's Greatest Lifesaver

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