Assertion: influenza pandemic | /r/CapableOf | last for about 19 months
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text: The 2009 swine flu pandemic was an influenza pandemic that lasted for about 19 months, from January 2009 to August 2010, and the second of two pandemics involving H1N1 influenza virus (the first being the 1918–1919 Spanish flu pandemic which lasted about 15 months).