Plot: As late as 1967, smallpox struck as many as 15 million people in 43 countries and killed an estimated two or three million. Experts now believe that the disease is on the verge of extinction

NOVA - Season 3 - Death of a Disease (Episode 17)
Episode Aired On:
Sunday, June 6 1976
48 years ago
Sunday, June 6 1976
48 years ago