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John Enders is born.
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Thomas Francis, Jr. is born.
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Theodore Roosevelt takes office.
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Albert Sabin is born.
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William H. Taft takes office.
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Woodrow Wilson takes office.
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World War I starts.
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Jonas Salk is born.
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Thomas Weller is born.
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Frederick Robbins is born.
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Hilary Koprowski is born.
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World War I ends.
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Warren G. Harding takes office.
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Calvin Coolidge takes office.
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Herbert Hoover takes office.
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Franklin D. Roosevelt takes office.
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Jonas Salk graduates from NYU School of Medicine.
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World War II starts.
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Harry S Truman takes office.
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World War II ends.
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Hilary Koprowski concocts the first effective live-virus polio vaccine.
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Jonas Salk announces development of a trial vaccine.
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Dwight D. Eisenhower takes office.
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Enders, Robbins, and Weller win the Nobel Prize.
Nobel Prize for Physiology or Medicine, 1954; for their cultivation of the virus poliomyelitis. -
Jonas Salk's polio vaccine is approved for use in the United States.
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The Sabin Vaccine begins testing in the USSR.
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John F. Kennedy takes office.
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The Sabin vaccine is approved for use in the United States.
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Lyndon B. Johnson takes office.
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Richard Nixon takes office.
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Thomas Francis, Jr. dies.
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Gerald Ford takes office.
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Jimmy Carter takes office.
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Ronald Reagan takes office.
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John Enders dies.
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George H. W. Bush takes office.
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Bill Clinton takes office.
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Albert Sabin dies.
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Jonas Salk dies.
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George W. Bush takes office.
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Frederick Robbins dies.
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Thomas Weller dies.
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Barack Obama takes office.
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Hilary Koprowski dies.