Polio

Although poliomyelitis has been around for thousands of years (images of polio victims appear in ancient Egyptian carvings), in the early 20th century it took on new urgency. In the early 1950’s the US averaged about 25,000 cases each year, spiking at 58,000 in 1952. Most people infected recovered, but about 1% of cases led to… Read More »The Polio Vaccine