Influenza

FluNet Summary

28 November 2016

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

National Influenza Centres (NICs) and other national influenza laboratories from 78 countries, areas or territories reported data to FluNet for the time period from 31 October 2016 to 13 November 2016 a (data as of 2016-11-25 04:15:03 UTC). The WHO GISRS laboratories tested more than 75463 specimens during that time period. 3603 were positive for influenza viruses, of which 3248 (90.1%) were typed as influenza A and 355 (9.9%) as influenza B. Of the sub-typed influenza A viruses, 63 (2.5%) were influenza A(H1N1)pdm09 and 2482 (97.5%) were influenza A(H3N2). Of the characterized B viruses, 34 (37%) belonged to the B-Yamagata lineage and 58 (63%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 25 November 2016)

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aThe time period from 31 October 2016 to 13 November 2016 corresponds to

  • FluNet / American calendar / International standard ISO 8601: weeks 44 and 45

Other analyses