- Australian Influenza Surveillance Report - 2022 Influenza Season in Australia
- NNDSS laboratory-confirmed influenza case definition – Technical Supplement
- Data Considerations
- Influenza vaccine efficacy, effectiveness and impact explained
- Previous Reports and Updates
- State and Territory Surveillance Reports
- Annual Reports
- National Influenza Surveillance Scheme
- Accessibility Issues
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 09 - fortnight ending 31 July 2022
It is important to note that due to the COVID-19 epidemic in Australia, data reported from the various influenza surveillance systems may not represent an accurate reflection of influenza activity. Results should be interpreted with caution, especially where comparisons are made to previous influenza seasons. Interpretation of influenza activity data from April 2020 onwards should take into account, but are not limited to, the impact of social distancing measures, likely changes in health seeking behaviour of the community including access to alternative streams of acute respiratory infection specific health services, and focussed testing for COVID-19 response activities. For information on COVID-19 incidence, severity, and distribution in Australia, please refer to COVID-19 epidemiology reports.
- A decrease in influenza-like-illness (ILI) activity in the community has been noted since July 2022.
- In the year to date, there have been 212,573 notifications reported to the National Notifiable Diseases Surveillance System (NNDSS) in Australia, of which 7,312 notifications had a diagnosis date this fortnight.
- The weekly number of notifications of laboratory-confirmed influenza in 2022 has decreased to below the weekly 5 year average this fortnight.
- In the year to date, of the 212,573 notifications of laboratory-confirmed influenza, 246 influenza-associated deaths have been notified to the NNDSS.
- Since commencement of seasonal surveillance in April 2022, there have been 1,581 hospital admissions due to influenza reported across sentinel hospitals sites, of which 6.5% were admitted directly to ICU.
- There is no indication of the potential impact of the 2022 season on society at this time.
- In 2022 to date, people aged 5–9 years, children aged younger than 5 years, and people aged 10–19 years have the highest notification rates.
- To date, 82.6% of notifications of laboratory-confirmed influenza reported to the NNDSS were influenza A, of which 94.4% were influenza A(unsubtyped), 0.8% were influenza A(H1N1), and 4.8% were influenza A(H3N2). Influenza B accounted for 0.1% of notifications,less than 0.1% were A&B co-infections, and 17.3% were untyped.
Vaccine match and effectiveness
- Of the 1,951 samples referred to the WHOCC to date, 97.4% of influenza A(H1N1), 93.2% of influenza A(H3N2), and the 4 influenza B/Victoria samples, were characterised as antigenically similar to the corresponding vaccine components.
- It is too early to assess vaccine match and effectiveness for this season.
- Australian Influenza Surveillance Report No. 09 – 18 July to 31 July 2022 - PDF
- Australian Influenza Surveillance Report No. 09 – 18 July to 31 July 2022 - Word
From 01 January 2022, the NNDSS case definition for laboratory-confirmed influenza was updated. For an overview of the case definition update, analyses of the impact of this change in case definition, and explanation of how data will be presented in influenza reports going forward, please refer to the NNDSS laboratory-confirmed influenza case definition Technical Supplement:
- NNDSS laboratory-confirmed influenza case definition - Technical Supplement - PDF
- NNDSS laboratory-confirmed influenza case definition - Technical Supplement - Word
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 2020 Data Consideration:
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.
- Influenza vaccine efficacy, effectiveness and impact explained - PDF
- Influenza vaccine efficacy, effectiveness and impact explained - Word
- Previous Reports - 2022
- Previous Reports - 2021
- Previous Reports - 2020
- Previous Reports - 2019
- Previous Reports - 2018
- Previous Reports - 2017
- Previous Reports - 2016
- Previous Reports and Updates - 2015
- Previous Reports and Updates - 2014
- Previous Reports - 2013
- Previous Reports - 2012
- Previous Reports - 2011
- Previous Reports - 2010
- Previous Reports - 2009
For further information regarding current influenza activity at the jurisdictional level, please refer to the following State and Territory departments of health surveillance reports:
- Australian Capital Territory: Influenza Surveillance Reports
- New South Wales: Influenza Surveillance Report
- Queensland: Statewide Weekly Influenza Surveillance Report
- South Australia: Weekly Epidemiological Summary (Influenza section)
- Tasmania: fluTAS
- Victoria: VIDRL Influenza Surveillance Reports
- Western Australia: Virus Watch
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.
- A Summary of Influenza Surveillance Systems in Australia, 2015 - PDF
- A Summary of Influenza Surveillance Systems in Australia, 2015 - Word
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.top of page