From where did the 2009 'swine-origin' influenza A virus (H1N1) emerge?
1 Australian National University Emeritus Faculty, ACT, 0200, Australia
2 CIDMLS, ICPMR, Westmead Hospital, NSW, 2145, Australia
Virology Journal 2009, 6:207 doi:10.1186/1743-422X-6-207Published: 24 November 2009
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