Diphtheria Returns to Australia: First Death in Decade Amidst Waning Immunity

Australia has recorded its first diphtheria-related death in nearly ten years, following a significant outbreak in the Northern Territory (NT) declared in March. Health authorities attribute the resurgence of this once-eradicated bacterial infection to declining vaccination rates post-pandemic. The NT has reported 126 cases this year, predominantly affecting Indigenous communities, while Western Australia's Kimberley region saw cases triple to 27 in a single month. Additional cases have emerged in South Australia and Queensland. Diphtheria, caused by Corynebacterium bacteria, spreads via respiratory droplets or skin contact, potentially leading to severe airway obstruction and death. Although treatable with antibiotics and antitoxins, global supply limitations and the disease's rapid progression pose challenges. Experts emphasize that vaccination remains the most effective prevention method. The outbreak highlights vulnerabilities in remote areas with overcrowded housing and limited healthcare access. Authorities urge Australians to update their immunizations, noting that booster doses are critical for maintaining immunity against this deadly, vaccine-preventable disease.