Diphtheria outbreak spreads from NT to three neighbouring states

Concern is rising among health officials about one of Australia's worst diphtheria outbreaks - which has now spread across the Northern Territory and into neighbouring states.There have been 133 reported cases of the infection in the NT so far - including one likely death - along with 79 cases in Western Australia, six in South Australia and two in Queensland.That's compared to fewer than 40 cases nationwide in all of 2025.GUEST: Dr Nicola Spurrier, South Australia's Chief Medical OfficerPRODUCER: Brooke Young