Influenza

FluNet Summary

26 January 2015

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

Based on FluNet reporting (as of 23 January 2015 18:05 UTC), during 2014 week 53 and 2015 week 1 (28 December 2014 to 10 January 2015), National Influenza Centres (NICs) and other national influenza laboratories from 88 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 133 812 specimens. 32 903 were positive for influenza viruses, of which 30 926 (94%) were typed as influenza A and 1977 (6%) as influenza B. Of the sub-typed influenza A viruses, 453 (3.4%) were influenza A(H1N1)pdm09 and 12 678 (96.6%) were influenza A(H3N2). Of the characterized B viruses, 495 (98%) belonged to the B-Yamagata lineage and 10 (2%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 23 January 2015)

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