Influenza

FluNet Summary

29 June 2015

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

National Influenza Centres (NICs) and other national influenza laboratories from 53 countries, areas or territories reported data to FluNet for the time period from 31 May 2015 to 13 June 2015a (data as of 25/06/2015 12:05 UTC). The WHO GISRS laboratories tested more than 23 577 specimens during that time period. 1620 were positive for influenza viruses, of which 1117 (69%) were typed as influenza A and 503 (31%) as influenza B. Of the sub-typed influenza A viruses, 172 (22.8%) were influenza A(H1N1)pdm09 and 582 (77.2%) were influenza A(H3N2). Of the characterized B viruses, 69 (83.1%) belonged to the B-Yamagata lineage and 14 (16.9%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 25 June 2015)

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aThe time period from 31 May 2015 to 13 June 2015 corresponds to

  • FluNet / American calendar: weeks 22 and 23
  • International standard ISO 8601: weeks 23 and 24

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