Reported influenza cases in Australia fell by approximately 65 percent between Jan. 1 and the end of May 2024 compared with the same period in 2023 [1].
This decline follows a period of extreme volatility in public health, coming after a record-breaking season that strained medical resources. The drop in infections suggests a shift in the viral trajectory following a year of unprecedented mortality.
Data from the Australian Centre for Disease Control (ACDC) show that over 33,000 cases were reported between Jan. 1 and the end of May 2024 [1]. During the corresponding window in 2023, the number of reported cases was just under 69,500 [1].
The reduction is significant when viewed against the backdrop of the 2025 season. That period was described as the worst year on record, resulting in 1,738 deaths attributed to the flu [2].
There are some discrepancies in the available reporting regarding total 2024 figures. While ACDC surveillance recorded over 33,000 cases through May [1], other reports indicated nearly 25,000 cases had been reported in Australia during the year [2].
Health officials continue to monitor the data as the region manages the aftermath of the 2025 spike. The ACDC surveillance data provide the primary basis for the current trend analysis, showing a sharp decrease in reported infections year-over-year [1].
“Reported influenza cases in Australia fell by approximately 65 percent”
The substantial decrease in influenza cases in early 2024 reflects a correction after the catastrophic 2025 season. While the 65 percent drop provides temporary relief to the healthcare system, the high death toll from the previous record-breaking year underscores the ongoing vulnerability of the population to severe flu strains.
