Influenza Activity Surveillance & Graph 2025
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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 3 February 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 13,451 notifications of laboratory confirmed influenza reported to the NNDSS in the year to 3 February 2025.
Total notifications from each state and territory are as follows:
ACT | 165 |
NSW | 5,224 |
NT | 150 |
QLD | 2,803 |
SA | 776 |
TAS | 183 |
VIC | 3,075 |
WA | 1,075 |
For more national data: National Notifiable Diseases Surveillance System (NNDSS)
Australian Influenza Surveillance Report
https://nindss.health.gov.au/pbi-dashboard/
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.
NCIRS has not commenced reporting of influenza vaccination coverage for the 2025 influenza season.
For more information visit NCIRS here
Australian Capital Territory
Reporting period Friday 17 January 2025 to Thursday 23 January 2025 inclusive
Total influenza cases:
- Current reporting period: 29
- 2025 total: 131
- Rate per 100,000 for reporting period: 6.1
New South Wales
Weekly influenza information is available in the COVID-19 weekly surveillance report.
Week ending 25 January 2025
Note that many people with influenza in the community do not get tested for influenza, and that there may be delays in the reporting of confirmed influenza cases. Therefore data presented here may tend to under-represent current influenza activity in NSW.
Summary:
- Influenza activity is at a low level.
- In the past week there was a decrease of 9.57% in influenza notifications.
For more information: NSW Health – Respiratory Surveillance Reports
Queensland
Data extracted on 28 January 2025
- 24 people were in hospital with Influenza, 12 (50%) were aged 65 years and above.
- 577 people diagnosed in the last week, 92 (16%) were aged 65 years or more.
South Australia
Update for the week ending at 25 January 2025:
Count of influenza notifications in the week ending 25 January 2025: 191
For more information: Communicable Diseases Control Branch
Tasmania
Week ending 19 January 2025
Summary
- Influenza activity is currently low and at inter-seasonal levels.
Influenza notifications for week ending 19 Jan: 47
2025 YTD influenza notifications: 132
* Notification rate per 100,000 population.
For more information: https://www.health.tas.gov.au/publications/respiratory-surveillance-report
Victoria
3 February 2025
Victoria, local public health areas and local government areas surveillance summary report
Total influenza cases (YTD): 3,184
For more information: Victorian Infectious Diseases Reference Laboratory or Victorian State Health Department
Western Australia
Week ending 26 January 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 13% to 270 cases but remained above the seasonal threshold.
- The influenza PCR test positivity at PathWest increased to 4.9% (53 detections) in the past week.
- PathWest reported 53 influenza detections in the past week, which included 33 A/H1, 5 A/H3, 10 influenza A not subtyped, and 5 influenza B.
For more information: WA Virus WAtch
Australian Sentinel Practices Research Network (ASPREN), FluTracking and New Zealand
Update for 16th December – 29th December 2024
ASPREN is a national syndromic surveillance program co-ordinated by the Discipline of General Practice at the University of Adelaide and The Royal Australian College of General Practitioners. One of the conditions under surveillance is influenza like illness (ILI). General practitioners participating in the ASPREN program contribute data on the proportion of consultations which are ILI related.
NATIONAL SUMMARY
Influenza-like-illness levels are increasing.
4 Cases of influenza have been detected in this reporting period:
- 3 x Influenza A
- 1 x Influenza B
2% Influenza positivity during the reporting period.
404 Cases of influenza have been detected this year:
- 388 x Influenza A
- 16 x Influenza B
SYNDROMIC SURVEILLANCE REPORTING
Reports were received from 328 reporters from 8 states and territories during the reporting period. During weeks 51 and 52 reporters saw a total of 35,839 patients.
INFLUENZA-LIKE-ILLNESS (ILI)
Nationally, ILI notifications decreased during the period with 128 notifications being reported in weeks 51—52. ILI rates reported in this period were 3 and 5 cases per 1000 consultations (weighted). This was higher than the previous fortnight where rates were 3 cases per 1000 consultations in weeks 49 and 50 respectively. For the same reporting period in 2023, ILI rates were lower at 3 and 4 cases per 1000 consultations for weeks 51 and 52 respectively.
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 20 January 2025- Sunday 26 January 2025
(Data used in this report received up to 09:00 AM, Thursday 30 January)
Summary:
- Respiratory illness levels have increased this week
- 29,418 participants this week
Respiratory illness activity* (age standardised):
*Respiratory illness activity is defined as fever & cough for this report
0.9% this week and 0.8% last week
Respiratory illness activity among Aboriginal and Torres Strait Islander participants:
0% this week and 0.8% last week
Respiratory illness severity:
23.9% of participants with fever and cough sought medical advice this week.
New Zealand
30 January 2025
Summary
The next scheduled update to this dashboard will be 27 February 2025.
The national rate of ILI-related calls to Healthline has remained relatively stable over the past four surveillance weeks. Influenza detections in community and hospital settings remain at low inter-seasonal levels.
Four respiratory illness outbreaks were reported between 1 January and 26 January 2025. Three were in aged residential care facilities in Hauora a Toi Bay of Plenty (SARS-CoV-2 detected), and one was in in an aged residential care facility in Te Pae Hauora o Ruahine o Tararua MidCentral (SARS-CoV-2 detected).
Since the last update on 21 December, the all-cause Severe Acute Respiratory Infection (SARI) hospitalisation rate in the Auckland region has remained very low, below the baseline seasonal threshold. Respiratory viruses continue to be detected at low inter-seasonal levels.
The influenza-positive SARI hospitalisation rate increased during January, is similar to previous years and reached the baseline seasonal threshold in the week ending 26 January.
The SARS-CoV-2-positive SARI hospitalisation rate remains low. 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/
Note that the results presented are based on data available as at 30 January 2025. These may be updated as more data become available and should be regarded as provisional. Please note that HealthStat ILI surveillance was discontinued during the 2024 season.
ASPREN: For more information: ASPREN
Flu Tracking: For more information, or to enroll: Flu Tracking
New Zealand reporting: For more information see here