A recent study by the National Centre for Immunisation Research and Surveillance (NCIRS) has raised concerns about a potential measles outbreak in Australia. Analyzing blood sample testing and vaccination records, the research found that approximately 1.7 million Australians (about 7% of the population) lacked sufficient immunity to the highly contagious disease, based on 2019 data. The overall measles immunity level in the country was calculated at 93.3%, which falls just short of the World Health Organization’s target of 93–95% needed to maintain effective herd immunity. Vulnerability was particularly high among several groups: infants too young to have completed their vaccination schedule, people born from the late 1970s onwards (who may have received only a single dose before the two-dose schedule became standard), and adults born around 1993–1995 or aged 60 and older. The timing is concerning given a sharp rise in measles cases in Australia recently — 113 cases were recorded in 2026, up from just seven in 2022. Many of these cases involved young adults who contracted the virus while traveling to endemic regions in Southeast Asia (such as the Philippines, Vietnam, and Thailand) and then brought it back home. Public health experts are urging people in at-risk age groups to check their vaccination records and consider an additional dose.
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