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Influenza Statistics

Get the latest Australian influenza figures, sourced from the National Notifiable Diseases Surveillance System (NNDSS)

Influenza Guide
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Influenza Activity Surveillance & Graph 2025

Click on the icon for a graph of statistics.

This report provides a summary of influenza surveillance data collected from around Australia and New Zealand. Regional reporting in some areas ceases when influenza activity is low (out of season). Please note that many people do not get tested for influenza and that there may also be some delays in reporting confirmed influenza cases.

Therefore data presented here may be underestimating influenza activity.

National Notifiable Diseases Surveillance System (NNDSS)

Update for 1 December 2025

It is important to note that data reported from the various influenza surveillance systems may not represent an accurate reflection of influenza activity. There may be some delays in the reporting systems. Also, many who become unwell with influenza-like symptoms do not present to their doctor and are not tested for influenza.

Results should be interpreted with caution.

National notification data (NNDSS):

There have been 460,614 notifications of laboratory confirmed influenza reported to the NNDSS in the year to 1 December 2025.

Total notifications from each state and territory are as follows:

ACT8,252
NSW171,235
NT4,702
QLD91,634
SA32,984
TAS8,223
VIC109,283
WA34,301

For more national data: National Notifiable Diseases Surveillance System (NNDSS)

Australian Influenza Surveillance Report

https://nindss.health.gov.au/pbi-dashboard

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National Vaccination Coverage Rates

Influenza vaccination is recommended for all Australians aged 6 months and older. Flu vaccination reporting to the Australian Immunisation Register (AIR) is mandatory allowing coverage rates to be monitored.

For more information visit NCIRS here

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Australian Capital Territory

Please note: ACT weekly reporting for 2025 has ended. The weekly report will start again in the autumn and winter months in 2026, when the ACT is likely to see an increase in respiratory illnesses again. An annual summary report for 2025 will be published in early 2026.

Reporting period Friday 24 October 2025 to Thursday 30 October 2025 inclusive.

Total influenza cases:

  • Current reporting period: 68
  • 2025 total: 7,826
  • Rate per 100,000 for reporting period: 14.3

For more information:

https://www.act.gov.au/directorates-and-agencies/act-health/strategies-programs-and-reports/reports/repiratory-illness-reporting-in-the-act

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New South Wales

Weekly influenza information is available in the COVID-19 weekly surveillance report.

 Week ending 22 November 2025

Influenza remained at a moderate level of activity but is increasing. This level of activity and increasing trend are very unusual for this time of year. These patterns are being driven predominantly by influenza A.

Summary:

  • Influenza is at a moderate level of activity.
  • In the past week there was an increase of 14.6% in influenza notifications.

For more information: NSW Health – Respiratory Surveillance Reports

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Queensland

Please note: This is the final report for the season. The full-year annual report for 2025 will be published in January 2026.

Reporting Period: 1 January – 5 October 2025

  • A total of 1,479 influenza cases were reported last week, 23% lower compared to the previous week’s total of 1,917 cases.
  • Notification rates remain higher in the sub-tropical region compared to the tropical region; however, both the regions are showing a steady decline.
  • Notification rates are higher among children under 5 years and adults aged 75 years and older but are steadily declining across all age groups.
  • 81,435 notifications during the YTD.
    • 58,697 (72%) were type A only and 21,518 (26%) were type B
    • 8,597 (11%) were aged less than 5 years including 370 (<1%) aged less than 6 months while 13,791 (17%) were aged 65 years and over.
    • 7,913 (10%) were admitted to hospital, 3,632 (46%) of these were aged 65 years and older.

For more information: https://www.health.qld.gov.au/clinical-practice/guidelines-procedures/diseases-infection/surveillance/reports/flu

QLD Health – Notifiable Diseases

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South Australia

Update for the week ending at 22 November 2025:

Count of influenza notifications in the week ending 22 November 2025: 801

For more information: Communicable Diseases Control Branch

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Tasmania

Week ending 9 November 2025

Summary

  • Influenza activity remains moderate but continues to gradually decline. While influenza B contributed to late seasonal activity since July, this activity has now decreased. Ongoing late seasonal activity is primarily driven by influenza A(H3N2).

Influenza notifications for week ending 9 November: 155

2025 YTD influenza notifications: 7,708

For more information: https://www.health.tas.gov.au/publications/respiratory-surveillance-report

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Victoria

1 December 2025

Victoria, local public health areas and local government areas surveillance summary report

Total influenza cases (YTD): 109,411

For more information: Victorian Infectious Diseases Reference Laboratory  or Victorian State Health Department

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Western Australia

Week ending 23 November 2025

Influenza and Influenza-like Illnesses (ILI) Summary:

  • In the past week, the number of influenza cases notified to the Department of Health decreased by 9% to 493 cases
  • The influenza PCR test positivity at PathWest remained stable at 5.9% (67 detections) in the past week.
  • PathWest reported 67 influenza detections in the past week, which included 3 A/H1, 49 A/H3, 10 influenza A not yet subtyped and 5 influenza B

For more information: WA Virus WAtch

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FluTracking and New Zealand

FluTracking

FluTracking is an online health surveillance system which aims to detect epidemics of influenza. It is a joint initiative of The University of Newcastle, Hunter New England Area Health Service (NSW Health) and Hunter Medical Research Institute. Participation is voluntary and involves the completion of a weekly online survey during the influenza season. Data are collected on basic demographics, symptoms of ILI and absenteeism.

Reporting week Monday 17 November 2025 – Sunday 23 November 2025
(Data used in this report received up to 09:00 AM, Thursday 27 November 2025)

Summary:

  • Respiratory illness levels have increased this week
  • 30256 participants this week

Respiratory illness activity* (age standardised):

*Respiratory illness activity is defined as fever & cough for this report

1.5% this week and 1.3% last week

Respiratory illness activity among Aboriginal and Torres Strait Islander participants:

0.8% this week and 1.4% last week

Respiratory illness severity:

Sought medical advice for fever and cough symptoms: 330.8% (74/240) this report* compared to 33.3% last report

*Includes those who sought medical advice from a general practitioner, Aboriginal and Torres Strait Islander health clinic, COVID-19 clinic, emergency department, or were admitted to hospital for fever and cough.

Flu Tracking: For more information, or to enroll: Flu Tracking

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New Zealand

23 November 2025

Summary

The national rate for ILI-related Healthline calls has been decreasing over the past four weeks to 23 November and is similar to this time in previous years. Central, followed by Te Waipounamu, have had the highest weekly rates of ILI-related Healthline calls. Virus detections are low across most laboratories, but influenza and RSV is still being detected.


Eight respiratory illness outbreaks were reported from 27 October to 23 November 2025. Seven were in aged residential care facilities: two had influenza detected (Southern, Bay of Plenty), one had SARS-CoV-2 (Hutt Valley), and four had unknown pathogens (one in each of MidCentral and Waikato and two in Southern). One outbreak of RSV was reported in a childcare centre in Southern.


Since the last update on 26 October, the weekly all cause hospitalisation rate for SARI in the Auckland region has decreased to below the baseline seasonal threshold but increased again into the low activity level in the week ending 23 November. Influenza (A predominant, A/H3 where typed) and rhinovirus have been the most frequently detected viruses among SARI patients. The influenza-positive SARI hospitalisation rate increased into the low activity level in the week ending 23 November after decreasing over the three weeks prior. PHF Science’s WHO National Influenza Centre reports that although the 2025 seasonal influenza vaccine provided good protection against the main circulating influenza strains this year, the A(H3N2) vaccine strain was likely not as effective against the influenza A(H3N2) viruses circulating later in the season.


The SARS-CoV-2-positive SARI hospitalisation rate remains low and is lower than this time in 2024. This does not necessarily reflect the trend in all COVID-19 related hospital admissions monitored by Health New Zealand, as different definitions for admission are used: https://tewhatuora.shinyapps.io/covid19/. PHF Science’s wastewater dashboard indicates overall decreasing community SARS-CoV-2 infection from the end of August
(https://www.phfscience.nz/digital-library/wastewater-dashboard/).


Note that the results presented are based on data available as at 27 November 2025. These may be updated as more data become available and should be regarded as provisional.

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