Influenza

FluNet Summary

14 December 2015

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

National Influenza Centres (NICs) and other national influenza laboratories from 79 countries, areas or territories reported data to FluNet for the time period from 16 November 2015 to 29 November 2015a (data as of 2015-12-10 13:22:14 UTC). The WHO GISRS laboratories tested more than 52160 specimens during that time period. 1615 were positive for influenza viruses, of which 1162 (72%) were typed as influenza A and 453 (28%) as influenza B. Of the sub-typed influenza A viruses, 408 (42.7%) were influenza A(H1N1)pdm09 and 548 (57.3%) were influenza A(H3N2). Of the characterized B viruses, 182 (74.9%) belonged to the B-Yamagata lineage and 61 (25.1%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 10 December 2015)

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aThe time period from 16 November 2015 to 29 November 2015 corresponds to

  • FluNet / American calendar: weeks 46 and 47
  • International standard ISO 8601: weeks 47 and 48

Other analyses