Influenza

FluNet Summary

16 October 2017

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

National Influenza Centres (NICs) and other national influenza laboratories from 85 countries, areas or territories reported data to FluNet for the time period from 18 September 2017 to 01 October 2017 a (data as of 2017-10-13 03:40:32 UTC). The WHO GISRS laboratories tested more than 56528 specimens during that time period. 3496 were positive for influenza viruses, of which 2566 (73.4%) were typed as influenza A and 930 (26.6%) as influenza B. Of the sub-typed influenza A viruses, 260 (15.1%) were influenza A(H1N1)pdm09 and 1460 (84.9%) were influenza A(H3N2). Of the characterized B viruses, 192 (81%) belonged to the B-Yamagata lineage and 45 (19%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 13 October 2017)

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aThe time period from 18 September 2017 to 01 October 2017 corresponds to

  • FluNet / American calendar / International standard ISO 8601: weeks 38 and 39

Other analyses