Definitions for H1N1
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Wiktionary
H1N1(Noun)
A strain of influenza, the most common cause of flu in humans; also the strain responsible for swine flu.
Origin: The strain classified as containing hemagglutinin type 1, and neuraminidase type 1.
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"H1N1." Definitions.net. STANDS4 LLC, 2013. Web. 25 May 2013. <http://www.definitions.net/definition/H1N1>.