Influenza

FluNet Summary

20 March 2017

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

National Influenza Centres (NICs) and other national influenza laboratories from 94 countries, areas or territories reported data to FluNet for the time period from 20 February 2017 to 05 March 2017 a (data as of 2017-03-17 09:50:51 UTC). The WHO GISRS laboratories tested more than 156226 specimens during that time period. 34376 were positive for influenza viruses, of which 26581 (77.3%) were typed as influenza A and 7795 (22.7%) as influenza B. Of the sub-typed influenza A viruses, 651 (8.1%) were influenza A(H1N1)pdm09 and 7392 (91.9%) were influenza A(H3N2). Of the characterized B viruses, 614 (71.4%) belonged to the B-Yamagata lineage and 246 (28.6%) to the B-Victoria lineage.

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

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aThe time period from 20 February 2017 to 05 March 2017 corresponds to

  • FluNet / American calendar / International standard ISO 8601: weeks 8 and 9

Other analyses