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1580 and 1350 B.C
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Roosevelt tried everything to overcome his disibility
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she was fron Australia, her ideas was not to keep polo patient inmovil
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and The United States entered in WW II
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that worked well in monkeys
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lo leave their porch lights on as a signal that they had a contribution waiting for the volunteers to danated money for polio
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Salk vaccine worked Polio nearly dissappeared
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