Influenza

FluNet Summary

22 September 2014

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

Based on FluNet reporting (as of 18 September 2014, 13:35 UTC), during weeks 35 to 36 (24 August 2014 to 6 September 2014), National Influenza Centres (NICs) and other national influenza laboratories from 50 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 22 607 specimens. 2675 were positive for influenza viruses, of which 2168 (81%) were typed as influenza A and 507 (19%) as influenza B. Of the sub-typed influenza A viruses, 529 (30.1%) were influenza A(H1N1)pdm09 and 1231 (69.9%) were influenza A(H3N2). Of the characterized B viruses, 66 (98.5%) belonged to the B-Yamagata lineage and 1 (1.5%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 18 September 2014)

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