For many decades, scientists could do little to treat polio. They knew its symptoms but had no idea how it was transmitted, or what caused the illness. Discover how it took hundreds of years, thousands of dollars, and a U.S. president to ultimately find a way to combat this deadly disease.

A crippling disease -- Unlocking the secrets of polio -- Understanding the science of polio -- Creating a polio vaccine -- Continuing the war on polio.