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Influenza surveillance from November 2008 to 2011;including pandemic influenza A(H1N1)pdm09 in Bhutan

The first case of A(H1N1)pdm09 infection was detected in Bhutan in July 2009, 3 months after the virus was first reported in Mexico in April 2009. During the official WHO pandemic period( 11 June 2009 to 8 August 2010), a total of 2149 samples were collected and tested by RT-PCR of which 22.7% (487) were confirmed A(H1N1)pdm09;H3N2,H1N1 and B positive in 2.2%, 1.1% and 7.2%, respectively.

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