Australia has confirmed its first diphtheria death in nearly a decade, as the country struggles to contain its worst outbreak of the vaccine-preventable disease in decades.

The death occurred in April at Royal Darwin Hospital in the Northern Territory, with autopsy results confirming diphtheria as the cause. The outbreak has affected several regions, including Western Australia, South Australia, and Queensland, with 245 cases reported this year, mostly in remote Indigenous communities.

Diphtheria Outbreak

The outbreak began in late 2025, with a sharp increase in cases in February. Health officials have ramped up vaccination efforts in affected areas, with over 10,000 vaccinations administered since March. The number of new cases is now declining, according to health officials.

The Australian government has taken steps to address the outbreak, including setting up pop-up clinics in Darwin, Katherine, and Alice Springs to raise awareness of the vaccination campaign. Authorities are urging communities to update their vaccinations, particularly teenagers and adults who need booster shots.

Diphtheria is a vaccine-preventable disease, with both respiratory and cutaneous strains preventable via a vaccine. The vaccine is typically given to children in five doses between two months and four years old, with a booster between 12 and 13 years. Respiratory diphtheria can be life-threatening, while cutaneous diphtheria usually causes infected sores or ulcers on exposed parts of the body.

Response and Implications

Australia’s Chief Medical Officer, Prof Michael Kidd, has declared diphtheria a communicable disease incident of national significance. The government has announced a package worth AU$7.2 million to boost vaccinations and resources in affected areas. Health officials are working to understand the causes of the outbreak and contain the situation.

The outbreak has significant implications for public health in Australia, highlighting the importance of vaccination and disease prevention. As the country continues to grapple with the outbreak, the need for continued vaccination efforts and awareness campaigns is crucial to preventing further spread of the disease.

The diphtheria outbreak in Australia serves as a reminder of the importance of vaccination and public health efforts in preventing the spread of infectious diseases, and its impact will be felt beyond the affected communities, underscoring the need for continued vigilance and investment in healthcare infrastructure.