Australia confirms first diphtheria death amid worst outbreak in decades

• Resurgence of vaccine-preventable disease: Australia is experiencing its worst diphtheria outbreak in decades, signalling potential gaps in immunisation coverage that warrant review of local vaccination programmes and patient records
• Geographic clustering: Cases concentrate in Northern Territory with spillover to other Australian regions, suggesting targeted public health intervention and immunisation campaigns are needed in affected areas
• Clinical vigilance required: The first diphtheria death confirms serious morbidity risk; clinicians should maintain high suspicion for diphtheria in patients with pharyngitis/respiratory symptoms, particularly in under-immunised populations, and ensure rapid diagnosis and antitoxin availability

Most cases are in the Northern Territory with some also in Western Australia, South Australia and Queensland.

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