Australian Influenza Surveillance Report

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: 11 October 2016

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, with updates also provided during the season. A more in-depth end-of-season report is also published in Communicable Diseases Intelligence journal.

Australian Influenza Surveillance Report No 09 - 17 September to 30 September 2016


  • Nationally, influenza activity has continued to decline following a seasonal peak in early September.
  • In the fortnight ending 30 September 2016, influenza activity was stable or decreasing across most regions in the country, with the exception of the Top End of the Northern Territory where activity continued to increase.
  • National indicators of influenza-like illness (ILI) continued to decline this fortnight, with influenza remaining the primary cause of ILI presentations to sentinel general practitioners. However, influenza A and rhinovirus were the respiratory viruses most commonly detected by sentinel laboratories.
  • Influenza A(H3N2) continued to be the dominant circulating influenza virus nationally.
  • Notification rates this year to date have been highest in adults aged 75 years or older, with a secondary, smaller peak in the very young, aged less than 5 years. This is consistent with influenza A(H3N2) being typically more prevalent in older age groups.
  • Clinical severity for the season to date, as measured through the proportion of patients admitted directly to ICU and deaths attributable to pneumonia or influenza, is moderate.
  • To date, the seasonal influenza vaccines appear to be a good match for circulating virus strains.

Full Report

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Previous Reports and Updates

Annual Reports

Accessibility Issues

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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