Pandemic (H1N1) 2009 - update 68
Weekly update (Virological surveillance data)
2 October 2009 -
The Global Influenza Surveillance Network (GISN) continues monitoring the global circulation of influenza viruses in particular those infecting or with the potential of infecting humans including seasonal influenza.
Since the beginning of the pandemic on 19 April 2009 to September 19th , a total of 80 countries reported to FluNet. The total number of specimens reported positive for influenza viruses by NIC laboratories was 123,740. Of these, 73,998 (59.8%) were pandemic H1N1, 6513 (5.3%) were seasonal A (H1), 18,182 (14.7%) were A (H3), 20,891 (16.9%) were A (Not subtyped) and 4156 (3.4%) were influenza B.
For this reporting week (13 September to 19 September 2009); a total of 21 countries reported to FluNet. The total number of specimens reported positive for influenza viruses by NIC laboratories was 8608. Of these, 5608 (65.1%) were pandemic H1N1, 186 (2.2%) were seasonal A (H1), 1002 (11.6%) were A (H3), 1702 (19.8%) were A (Not subtyped) and 110 (1.8%) were influenza B.
All pandemic H1N1 2009 influenza viruses analysed to date have been antigenically and genetically similar to A/California/7/2009-like pandemic H1N1 2009 virus.