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