Influenza

FluNet Summary

8 September 2014

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

Based on FluNet reporting (as of 4 September 2014, 13:35 UTC), during weeks 33 to 34 (10 August 2014 to 23 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 26 262 specimens. 3222 were positive for influenza viruses, of which 2632 (81.7%) were typed as influenza A and 590 (18.3%) as influenza B. Of the sub-typed influenza A viruses, 416 (17.8%) were influenza A(H1N1)pdm09 and 1920 (82.2%) were influenza A(H3N2). Of the characterized B viruses, 88 (98.9%) belong to the B-Yamagata lineage and 1 (1.1%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 4 September 2014)

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