Australian Influenza Surveillance Report and Activity Updates

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; ILI-related community level surveys; and sentinel laboratory testing results.

Page last updated: 01 August 2017

The Australian Influenza Surveillance Report (AISR) is published on a fortnightly basis during the influenza season, typically between May and October. Influenza activity updates may be published outside of the seasonal period.

Australian Influenza Surveillance Report No 05 - 08 July to 21 July 2017


  • Influenza activity at the national level continued to increase this reporting fortnight indicating that the season is underway in a majority of regions across Australia. This increase in activity occurred approximately one month earlier than in 2016.
  • Influenza was detected at increasing levels by the majority of sentinel laboratories this reporting fortnight. For the first time since reporting for 2017 began, influenza A was the most common respiratory virus detected by a majority of sentinel laboratories, followed by respiratory syncytial virus (RSV).
  • Influenza A(H3N2) is currently the predominant circulating A subtype in the majority of jurisdictions. Nationally, notifications of laboratory confirmed influenza B viruses reached a plateau this reporting fortnight.
  • Notification rates this year to date have been highest in adults aged 85 years or older, with a secondary peak in young children, aged less than 10 years.
  • Influenza-like illness (ILI) in the community and ILI presentations to sentinel GPs this fortnight continued the overall increasing trend, however remain within the range of recent seasons.
  • Hospitalisations with confirmed influenza have increased in recent weeks in line with the seasonal increase in community level activity.
  • To date, the seasonal influenza vaccines appear to be a good match for circulating virus strains.

Full Report

Data considerations

The AISR aims to increase awareness of influenza activity in Australia by providing an analysis of the various surveillance data sources throughout Australia. While every care has been taken in preparing this report, the Commonwealth does not accept liability for any injury or loss or damage arising from the use of, or reliance upon, the content of the report. Delays in the reporting of data may cause data to change retrospectively. For further details about information contained in this report please refer to the AISR 2017 Data Consideration:

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Previous Reports and Updates

State and Territory Surveillance Reports

For further information regarding current influenza activity at the jurisdictional level, please refer to the following State and Territory departments of health surveillance reports:

Annual Reports

National Influenza Surveillance Scheme

This paper provides a comprehensive summary and analysis of the National Influenza Surveillance Scheme, including surveillance systems that function outside of the Scheme, in 2015. The Scheme is coordinated by the Australian Government Department of Health and supported by a number of surveillance systems that aim to be nationally representative and monitor important aspects of severity, incidence and virology. Influenza activity monitored through its systems is presented in reports available on this page. Several jurisdictionally based surveillance systems that operate outside of the Scheme are used to inform local influenza activity trends. This paper describes the strengths and limitations of these influenza surveillance systems in terms of the aspects of influenza activity that they inform  and their contribution to the overall monitoring of influenza activity in Australia.

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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