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Jonas Salk was bown
Creator of the polio vaccine -
Large outbreak of polio in New York
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Franklin Roosvelt got polio
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the first iron lung appeared
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Roosvelt started the Warm Springs Foundation
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Roosvelt was elected president
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two Failure of polio vaccines
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Sister Kenny arrives to the US from Australia
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US entered World War II
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Salk anounced that there are only 3 polio virus
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Sabin and Salk met
Sabin proponed Salk to join, however Salk turned him down. -
Salk's vaccine is succesfuly tested
...on himself, members of the lab and children. -
4680 polio cases reported
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Succesful Vaccine was repoted to the National Foundation
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Disneyland opened
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Polio had nearly dissapeared in the USA