Weekly Virological Update on 26 August 2010
Trend of proportions of different type and subtype influenza viruses
Summary on week 32
Global Virological Surveillance
Overall influenza activity has remained low. Co-circulation of pandemic A(H1N1), A(H3N2) and influenza B viruses was reported from Australia, China, Chile and India. Globally 71.2%+ of the sub-typed influenza A viruses were pandemic influenza A(H1N1) circulating. This is the predominant virus in New Zealand and India. Elsewhere sporadic activity of pandemic influenza A(H1N1) ,influenza B and/or A(H3N2) was detected in some countries.
For the week 8 August to 14 August 2010. National Influenza Centres (NICs) from 25 countries reported data to FluNet. Of the total 1,043 specimens reportedly positive for influenza viruses, 947 (90.8%) were typed as influenza A and 96 (9.2%) as influenza B.
WHO, through the GISN, continues monitoring the global circulation of influenza viruses, including pandemic, seasonal and other influenza viruses infecting, or with the potential to infect humans.*
* Some NICs report data to FluNet retrospectively and updates of previous data with new results are frequent.