Influenza

FluNet Summary

13 January 2014

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

Based on FluNet reporting (as of 9 January 2014, 08:05 UTC), during weeks 50 to 52 (8 December 2013 to 28 December 2013), National Influenza Centres (NICs) and other national influenza laboratories from 99 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 88 471 specimens. 17 640 were positive for influenza viruses, of which 15 233 (86.4%) were typed as influenza A and 2406 (13.6%) as influenza B. Of the sub-typed influenza A viruses, 6889 (67.2%) were influenza A(H1N1)pdm09, and 3365 (32.8%) were influenza A(H3N2). Of the characterized B viruses, 352 (81.1%) belong to the B-Yamagata lineage and 82 (18.9%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 9 January 2014)

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