View of chart with two separate graphs on notifications of outbreaks of polio. Arrow points to different line progression on graph as doctor narrates. Graph slides away to be replaced by another on, with a graph showing the peak of the notifications of outbreaks in 1947. Graph slides away to be replaced with picture of map in 1926 with different colors on map telling where infections are. Map changes as years change, colors grow and disappear. Stops on 1947, showing most of the country colored with infection, as doctor mentions all the deaths that year.