Want to know more?
For more information on any of the topics explored here, please feel free to visit any of these excellent websites:
Smithsonian Institute
http://americanhistory.si.edu/polio/
Global Polio Eradication Initiative
http://www.polioeradication.org/
Centers for Disease Control and Prevention
http://www.cdc.gov/polio/
Photo Essay: The End of Polio by Sebastiao Salgado
http://www.pbs.org/now/science/endofpolio.html