Diphtheria in Australia – Epidemiological update – 24 August 2026 Published: 28 August 2026 🔹In 2026, Australia has recorded 538 diphtheria cases 🔹Over the past fortnight 17 total cases were notified 🔹NT: 289 cases, WA: 226 cases, SA: 18 cases, QLD: 5 cases https://www.cdc.gov.au/resources/publications/diphtheria-australia-epidemiological-update-24-august-2026