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Australia Faces 'Biggest Diphtheria Outbreak' in Decades

The federal package will add vaccines, antibiotics and extra staff as officials say about 25% of patients have needed hospital care.

  • On Tuesday, the federal government announced a $7.2 million emergency support package to boost vaccination rates and deploy clinicians to combat Australia's largest diphtheria outbreak in decades, with over 230 cases reported nationally.
  • Falling childhood vaccination rates, hitting a five-year low in 2025, are driving the resurgence, alongside socio-economic factors like overcrowded housing in remote communities that facilitate bacterial spread.
  • Roughly 94% of cases since January involve Indigenous Australians, with about 30% being the more dangerous respiratory strain, according to the Australian Centre for Disease Control; nearly 25% of patients required hospitalization.
  • The outbreak has spread from the Northern Territory into Western Australia, Queensland, and South Australia, while health authorities await autopsy results for a suspected diphtheria-related death, the first potentially fatal case in a decade.
  • Health officials have revised recommended booster intervals from 10 to five years for at-risk populations, while urging Australians to check immunization status at local clinics to help curb the spread.
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Remote health staff plea as disease outbreak spreads

Australia's worst diphtheria outbreak in decades highlights a shortfall in health workers in remote communities as a multimillion-dollar...

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ABC Australia broke the news in Australia on Tuesday, May 19, 2026.
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