Modern Marvels: Polio Vaccine

The search for a vaccine that would eradicate polio was a quest that frustrated the brightest minds in medicine. But in the early 1950s, a young American doctor named Jonas Salk made a revolutionary breakthrough that forever changed the world and ultimately saved millions of lives. Through interviews with both polio victims and scientists, this installment of the History Channel's "Modern Marvels" series illuminates Salk's dramatic discovery.