Khan Academy
Khan Academy: Polio Vaccinations
A discussion of the likes and differences of the two polio vaccines, Salk and Sabin.
Smithsonian Institution
National Postal Museum: Art of the Stamp: Albert Sabin
View the artwork for a U.S. postage stamp issued in 2006 to commemorate Albert Sabin, a famous virologist who developed the polio vaccination. With a short biographical passage.