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Polio Discovered
Physician Michael Underwood describes symptoms for the first time ever. -
First Polio Outbreak in U.S.
Polio spreads in Vermont. 132 cases were reported -
Second Outbreak in U.S. Even Worse
Nation wide, 27,000 cases were reported. 6,000 of them died. -
Iron Lung Developed
Philip Drinker and Louis Shaw create the iron lung to help with respiratory problems. -
Maurice Brodie and John Kolmer Test Polio Vaccines
When Brodie and Kolmer tested the vaccine, they got disasterous results. The vaccine actually gave people polio, some cases fatal. -
F.D.R. Forms March of Dimes
Franklin Roosevelt founded the March of Dimes, an organization in the fight against polio. -
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Dr. Jonas Salk Create Polio Vaccine
Dr. Jonas Salk and his associates develop the first polio vaccine over the period of six years -
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Dramatic decrease in Polio Cases
Cases of polio in the U.S. falls by %85 - %90. -
National Immunization Day
The first National Immunization Day for polio is held in Brazil. -
Vaccine Changes
Inactivated polio vaccine replaces oral vaccine.
