Influenza

FluNet Summary

25 August 2014

Source: Laboratory confirmed data from the Global Influenza Surveillance and Response System (GISRS).

Based on FluNet reporting (as of 25 August 2014, 11:25 UTC), during weeks 31 to 32 (27 July 2014 to 9 August 2014), National Influenza Centres (NICs) and other national influenza laboratories from 51 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 26 644 specimens. 4014 were positive for influenza viruses, of which 3645 (90.8%) were typed as influenza A and 368 (9.2%) as influenza B. Of the sub-typed influenza A viruses, 534 (16.8%) were influenza A(H1N1)pdm09 and 2636 (83.2%) were influenza A(H3N2). Of the characterized B viruses, 37 (94.9%) belong to the B-Yamagata lineage and 2 (5.1%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 25 August 2014)

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