Return of swine-origin H1N1 influenza to the US
Of the many questions that I receive about influenza, one of the most common is “when will swine flu return to the US?”. In other words, when will the 2009 pandemic H1N1 strain, first recognized in humans in April 2009, emerge for the 2009-2010 influenza season? “Return” is probably not the correct word to use, …