30 September- Update number 195
• Influenza activity in the northern hemisphere temperate zones remained at inter-seasonal levels.
• In most regions of tropical Asia influenza activity decreased, with the exception of Hong Kong Special Administrative Region, China, where influenza activity associated with A(H3N2) viruses increased.
• In the Caribbean region of Central America and tropical South America the influenza season appeared to have come to an end. Acute respiratory infections continued to decline. Respiratory Syncytial Virus predominated, and influenza A(H1N1)pdm09 and influenza A(H3N2) were the main respiratory viruses reported since May of this year.
• Influenza activity peaked in the temperate countries of South America and in South Africa in late June. Influenza activity in these areas was primarily associated with influenza A(H1N1)pdm09 throughout the season, but since July greater numbers of influenza A(H3N2) and influenza type B viruses were observed.
• Australia and New Zealand had a late start of a season in August. Influenza activity seemed to decrease in mid-September in Australia. Co-circulation of influenza A(H3N2), influenza A(H1N1)pdm09 and type B was reported in both countries.
• Additional and updated information on non-seasonal influenza viruses can be found at the Human-Animal Interface (HAI) page- link below
Source of data
The Global Influenza Programme monitors influenza activity worldwide and publishes an update every two weeks.
The updates are based on available epidemiological and virological data sources, including FluNet (reported by the Global Influenza Surveillance and Response System) and influenza reports from WHO Regional Offices and Member States. Completeness can vary among updates due to availability and quality of data available at the time when the update is developed.