Influenza

FluNet Summary

27 January 2014

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

Based on FluNet reporting (as of 23 January 2014, 13:25 UTC), during weeks 1 to 2 (29 December 2013 to 11 January 2014), National Influenza Centres (NICs) and other national influenza laboratories from 72 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 81 261 specimens. 24 494 were positive for influenza viruses, of which 22 425 (91.6%) were typed as influenza A and 2069 (8.4%) as influenza B. Of the sub-typed influenza A viruses, 11 033 (80.5%) were influenza A(H1N1)pdm09 and 2669 (19.5%) were influenza A(H3N2). Of the characterized B viruses, 220 (84%) belong to the B-Yamagata lineage and 42 (16%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 23 January 2014)

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The next update will be published on 10 February 2014.

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