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 - 2019 Influenza Season in Australia
- Activity – Currently, influenza and influenza-like illness (ILI) activity are high for this time of year compared to previous years. At the national level, notifications of laboratory-confirmed influenza have increased in the past fortnight. The number of laboratory-confirmed notifications of influenza reported to the NNDSS in the 2019 year-to-date are greater when compared to the same periods in 2017 and 2018, however, this is due to heightened interseasonal activity.
- Severity – There is no indication of the potential severity of the 2019 season at this time.
- Impact – There is no indication of the potential impact on society of the 2019 season at this time.
- Virology – In the year to date and in the past fortnight, the majority of confirmed influenza cases reported nationally were influenza A (81%). Where subtyping data were available, influenza A(H3N2) was the dominant influenza A subtype in the past fortnight, however, the proportion of influenza B has been steadily increasing in a number of jurisdictions since late April.
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 2018 Data Consideration:
Influenza vaccine efficacy, effectiveness and impact explained
There are three general terms that are used to describe how well a vaccine works in any given influenza season: vaccine efficacy, vaccine effectiveness and vaccine impact. This document provides a general explanation of each of these terms as well as information specific to influenza vaccines.
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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:
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.
Should you encounter issues in accessing the information contained either on this webpage or within the downloadable full reports please email flu (firstname.lastname@example.org) or contact the Department of Health switchboard on 02 6289 1555 or 1800 020 103.
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