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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 17 November 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 441,863 notifications of laboratory confirmed influenza reported to the NNDSS in the year to 17 November 2025.

Total notifications from each state and territory are as follows:

ACT7,979
NSW163,929
NT4,313
QLD88,736
SA31,434
TAS7,800
VIC104,298
WA33,374

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 1 November 2025

While some influenza indicators have declined, overall activity is stable but still at a moderate level, which is unusual for this time of year.

Summary:

  • Influenza is at a moderate level of activity.
  • In the past week there was an increase of 4.7% 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 1 November 2025:

Count of influenza notifications in the week ending 1 November 2025: 501

For more information: Communicable Diseases Control Branch

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Tasmania

Week ending 26 October 2025

Summary

  • Influenza activity remains moderate but is declining, except among those aged 65 years and older. Late seasonal activity has been driven by increases in influenza B since July and more recently by influenza A (H3N2) since early September.

Influenza notifications for week ending 26 October: 183

2025 YTD influenza notifications: 7,380

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

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Victoria

10 November September 2025

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

Total influenza cases (YTD): 102,329

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

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Western Australia

Week ending 2 November 2025

Influenza and Influenza-like Illnesses (ILI) Summary:

  • In the past week, the number of influenza cases notified to the Department of Health increased marginally to 661 cases.
  • In the year to date, influenza notifications and hospitalisations were higher than the previous five year average, while the number of deaths was lower. Just over a third of notifications were in those aged less than 15 years.
  • The number of influenza cases reported as hospitalised in the past week increased in adults and decreased in children.
  • The influenza PCR test positivity at PathWest decreased to 5.5% (62 detections) in the past week.
  • PathWest reported 62 influenza detections in the past week, which included 6 A/H1, 43 A/H3, 1 influenza A not yet subtyped and 12 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 27 October 2025- Sunday 02 November 2025

(Data used in this report received up to 09:00 AM, Thursday 06 November 2025)

Summary:

  • Respiratory illness levels have increased this week
  • 44697 participants this week

Respiratory illness activity* (age standardised):

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

1.3% this week and 1% last week

Respiratory illness activity among Aboriginal and Torres Strait Islander participants:

0.8% this week and 0.5% last week

Respiratory illness severity:

Sought medical advice for fever and cough symptoms: 32.5%(95/292)this report*comparedto34.3%lastreport.

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

26 October 2025

Summary

The national rate for ILI-related Healthline calls is now similar to this time in previous years. Te Waipounamu continues to have the highest weekly rates of ILI-related Healthline calls, however, rates have been decreasing overall since mid-September and are now similar to the national rate. Influenza continues to be the predominant virus among detections across most laboratories.

Two respiratory illness outbreaks were reported in the week ending 26 October, both in aged residential care facilities and with unknown pathogens. The outbreaks were in MidCentral and Capital and Coast.

The all-cause Severe Acute Respiratory Infection (SARI) hospitalisation rate in the Auckland region increased in the week ending 26 October but remains at the low activity level. Influenza (A predominant, A/H3 where typed) was the most frequently detected viruses among SARI patients. The influenza-positive SARI hospitalisation rate increased slightly but remains at the low activity level in the week ending 26 October. The PHF Science WHO National Influenza Centre reports a good antigenic match of circulating viruses to the seasonal influenza vaccine.

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 30 October 2025. These may be updated as more data become available and should be regarded as provisional.


New Zealand reporting: For more information see here

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