1.7 Million Australians Susceptible to Measles in 2019

A new study conducted by the National Centre for Immunisation Research and Surveillance (NCIRS) found that 1.7 million Australians—about 6.7 % of the population—were susceptible to measles in 2019. The research, which analysed national immunisation records and serological data, indicates that a significant portion of the population lacked sufficient immunity to the virus.

The NCIRS analysis compared 2019 data with earlier years and noted a decline in overall measles immunity, partly due to lower vaccination uptake in certain age groups. The study highlighted that gaps in immunity could increase the risk of outbreaks, especially as international travel and global disease circulation continue. Public health authorities have used these findings to target catch‑up vaccination campaigns in communities with lower coverage.

The study underscores the importance of maintaining high immunisation rates to prevent measles resurgence. Health officials are urged to strengthen surveillance and vaccination outreach, particularly in regions where susceptibility remains high, to protect Australia from future outbreaks.