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The 2009 flu pandemic in the United States was caused by a novel strain of the Influenza A/H1N1 virus, commonly referred to as "swine flu", that was first detected on April 15, 2009. While the 2009 H1N1 virus strain was commonly referred to as "swine flu", there is no evidence…
The 2009 flu pandemic in the United States was caused by a novel strain of the Influenza A/H1N1 virus, commonly referred to as "swine flu", that was first detected on April 15, 2009. While the 2009 H1N1 virus strain was commonly referred to as "swine flu", there is no evidence…
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