Clip Description: "What is Polio?"
Dr. Walter Orenstein, Deputy Director of Vaccine Delivery at the Bill & Melinda Gates Foundation, describes how the polio virus is spread and how it affects the nervous systems of its unsuspecting victims.



More Clips

Film Clip 1: "Before Vaccines"
Film Clip 2: "What Is Polio?"
Film Clip 3: "Jonas Salk"

Film Clip 4: "Down To The Lab"
Film Clip 5: "Risk Vs. Reward"
Film Clip 6: "Why Can't This Happen About Other Things?"