Influenza

FluNet Summary

20 February 2017

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

National Influenza Centres (NICs) and other national influenza laboratories from 83 countries, areas or territories reported data to FluNet for the time period from 23 January 2017 to 05 February 2017 a (data as of 2017-02-17 11:53:23 UTC). The WHO GISRS laboratories tested more than 154949 specimens during that time period. 40292 were positive for influenza viruses, of which 36922 (91.6%) were typed as influenza A and 3370 (8.4%) as influenza B. Of the sub-typed influenza A viruses, 418 (2.9%) were influenza A(H1N1)pdm09 and 14024 (97.1%) were influenza A(H3N2). Of the characterized B viruses, 332 (62.8%) belonged to the B-Yamagata lineage and 197 (37.2%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 17 February 2017)

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aThe time period from 23 January 2017 to 05 February 2017 corresponds to

  • FluNet / American calendar / International standard ISO 8601: weeks 4 and 5

Other analyses