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The exact duration of the flu season varies by hemisphere and environmental factors. In the northern hemisphere, the flu season occurs in the winter.
Wiki User
∙ 9y ago
Wiki User
∙ 12y agoMost cases of influenza in the United States fall between the months of November and March, with most cases in February. So the flu season is considered over for 2010-2011 as of June 2011.
Wiki User
∙ 12y agoType your answer here... start in Nov. and ends in march end
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