History of flu outbreaks

Published On: Jan 10 2013 11:47:55 AM CST

The flu season is in full swing and reported cases are spreading quickly throughout the U.S. Take a look at history's four main flu outbreaks.

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The number of deaths between September 1968 and March 1969 was 33,800, making it the mildest flu pandemic in the 20th century.

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