In the 1950s, as Dr. Jonas Salk and virologist Albert Sabin worked to create a vaccine to prevent infantile paralysis, the threat from polio was already long familiar to Americans.
(Image credit: AP)
In the 1950s, as Dr. Jonas Salk and virologist Albert Sabin worked to create a vaccine to prevent infantile paralysis, the threat from polio was already long familiar to Americans.
(Image credit: AP)