Australia has recorded its first death from diphtheria in decades, a chilling reminder of a disease many thought consigned to history. The victim, a child under five, died in a New South Wales hospital. The infection, caused by toxigenic Corynebacterium diphtheriae, was confirmed late on Tuesday. Health authorities, who declined to name the child, said the case is now being treated as a 'sentinel event'. Sources close to the investigation confirm that the child had not been fully vaccinated. A fact that will haunt officials in Australia and beyond.
Diphtheria, a vaccine-preventable disease, was once a leading cause of childhood death in the developed world. Widespread immunisation programmes drove it to near extinction. But pockets of vaccine hesitancy, coupled with global travel, have allowed the bacterium to re-emerge. The UK Health Security Agency (UKHSA) has already issued a warning to frontline clinicians. On Wednesday, an internal email obtained by this desk instructed GPs and emergency departments to 'maintain a high index of suspicion' for diphtheria in patients presenting with sore throat, fever, and swollen glands (the classic 'bull neck' sign). UKHSA confirm they are in contact with Australian counterparts.
Australia's death rate from diphtheria had been zero since 1992. The last major outbreak in the UK was in the 1940s. But a single cluster in London in 2022, linked to an unvaccinated community, saw six cases. A source in the UKHSA's immunisation division told me that 'the risk is low, but complacency is our enemy'. That source is right. The disease can kill within a week, producing a toxin that damages the heart and nerves. Survivors often face months of rehabilitation.
And here is the uncomfortable truth. The global diphtheria resurgence follows a decline in routine vaccination rates in several nations. The World Health Organization reports that global coverage of the third dose of the diphtheria-tetanus-pertussis vaccine has stagnated at around 86 per cent. In some regions, it has fallen below 80 per cent. This is a failure of public health and a failure of policy. The UK achieved 95 per cent coverage for children by age five in 2019. But that figure slipped to 92 per cent in 2023. In London, it is lower still.
I have seen the data. I have read the memos. Officials are scrambling to reassure the public while quietly stockpiling diphtheria antitoxin. They are running scenario planning for an outbreak. They are asking general practitioners to check vaccination status at every opportunity. But will it be enough? The death in Australia is not an isolated tragedy. It is a warning. A warning directed at every health service that has allowed vaccination rates to drift.
The UKHSA has not yet confirmed any cases in the current period. But sources say surveillance has been intensified. Laboratories have been ordered to send all suspected diphtheria isolates for confirmatory testing in real time. The mantra is 'detect early, treat fast, contain swiftly'. But if a single child can die in a country with universal healthcare and robust vaccine supply, the same could happen here.
This story is not about a forgotten disease. It is about forgotten lessons. It is about the cost of inertia. And the bodies always pay. I will keep digging.
