Australian Influenza Activity Update – week ending 08 May 2015 (#04/2015)

The Australian Influenza Surveillance Report and Activity Updates are compiled from a number of data sources, which are used to monitor influenza activity and severity in the community. These data sources include laboratory-confirmed notifications to NNDSS; influenza associated hospitalisations; sentinel influenza-like illness (ILI) reporting from general practitioners and emergency departments; ILI-related call centre calls and community level surveys; and sentinel laboratory testing results.

Page last updated: 19 May 2015

The Australian Influenza Surveillance Report is published on a fortnightly basis during the influenza season, typically between May and October. Influenza activity updates will be published outside of the seasonal period. A more in-depth end-of-season report is also published in Communicable Diseases Intelligence journal.

Australian Influenza Activity Update - week ending 08 May 2015


  • Australia is currently in the inter-seasonal period for influenza, with overall influenza activity at low levels.
  • Influenza activity across jurisdictions is variable. Recent activity in many jurisdictions has decreased from the unusually high activity seen earlier this year.
  • Nationally, influenza A is the predominant circulating virus type; of those viruses where subtyping data are available, influenza A(H3N2) is the most common.
  • Of the limited number of isolates that have been further characterised for similarity with the vaccine components, influenza A viruses appear to be well matched. Approximately three-quarters of the influenza B viruses characterised are a match to the trivalent vaccine strain; with the remaining influenza B viruses matching the additional strain in the quadrivalent vaccine.
  • Influenza-like illness (ILI) levels detected through the sentinel GP ILI surveillance system remain lower than previous years. In the most recent fortnight, rhinovirus infection was the most common cause of ILI detected.

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Should you encounter issues in accessing the information contained either on this webpage or within the downloadable full reports please email flu ( or contact the Department of Health switchboard on 02 6289 1555 or 1800 020 103.

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