Influenza

FluNet Summary

10 February 2014

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

Based on FluNet reporting (as of 6 February 2014, 12:30 UTC), during weeks 3 to 4 (12 January 2014 to 25 January 2014), National Influenza Centres (NICs) and other national influenza laboratories from 97 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 68 458 specimens. 19 547 were positive for influenza viruses, of which 17 992 (92%) were typed as influenza A and 1555 (8%) as influenza B. Of the sub-typed influenza A viruses, 8257 (79.75%) were influenza A(H1N1)pdm09, 2096 (20.24%) were influenza A(H3N2) and 1 (0.01%) was influenza A(H5N1). Of the characterized B viruses, 200 (69.7%) belong to the B-Yamagata lineage and 87 (30.3%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 6 February 2014)

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