Influenza

FluNet Summary

28 July 2014

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

Based on FluNet reporting (as of 25 July 2014, 07:15 UTC), during weeks 27 to 28 (29 June 2014 to 12 July 2014), National Influenza Centres (NICs) and other national influenza laboratories from 55 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 25 675 specimens. 3184 were positive for influenza viruses, of which 2844 (89.3%) were typed as influenza A and 340 (10.7%) as influenza B. Of the sub-typed influenza A viruses, 416 (17.6%) were influenza A(H1N1)pdm09 and 1948 (82.4%) were influenza A(H3N2). Of the characterized B viruses, 89 (97.8%) belong to the B-Yamagata lineage and 2 (2.2%) to the B-Victoria lineage.

Global circulation of influenza viruses
(GISRS-FluNet, snapshot 25 July 2014)

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