Holiday measles infections rise, prompting health alerts in NSW, SA and Victoria

Measles cases in Australia rose to 168 in 2025 while early childhood vaccination coverage for two-year-olds fell to 89.7%, and health alerts were issued in multiple states amid holiday travel-linked clusters.

Health authorities across Australia have issued alerts after measles cases increased over the 2025 summer. The rise has been linked with international holiday travel and a decline in early childhood vaccination coverage. National data show two-year-old vaccination coverage fell below the usual 95% herd-immunity threshold for the first time in a decade. Key facts: - Australia recorded 168 measles cases in 2025, up from 57 in 2024. - Data from the National Centre for Immunisation Research and Surveillance (NCIRS) show two-year-old MMR coverage fell to 89.7%. - A holiday "Boxing Day" cluster is reported to have involved a traveller who was infectious while moving across multiple states, prompting multi-state alerts and contact tracing. - Authorities reported measles is airborne and can linger in a room for up to 30 minutes, and noted eligibility for a free MMR booster for people born in or after 1966 who have not had two doses. Summary: The increase in cases reflects lower childhood vaccination coverage combined with international travel during the holiday period. Health departments have issued alerts and begun contact tracing. Undetermined at this time.