New national surveillance data shows 117 confirmed cases recorded between January 1 and April 27 2026, with adults aged 25 to 44 years accounting for 46 percent of all notifications.
The trend highlights what health authorities have long warned: diphtheria is no longer confined to childhood.
In 2023, 70 percent of adults aged over 50 were not up to date for tetanus and diphtheria boosters.
PGA's Simon Blacker
PGA’s National Vice President Simon Blacker said the increase underscores the importance of staying up-to-date with boosters throughout adulthood.
“Community pharmacists can quickly and easily help people check their vaccination records, provide expert advice and, where appropriate, administer diphtheria‑containing vaccines — often with no appointment required,” Simon said.
He said many people in Australia are unaware they are overdue for a booster, despite longstanding recommendations for adults to receive one every 10 years.
“In 2023, 70 percent of adults aged over 50 were not up to date for tetanus and diphtheria boosters,” he said, citing research published in the Medical Journal of Australia.
Pharmacies stepping up
Community pharmacists can access and update the Australian Immunisation Register, helping patients understand whether they are fully protected and offering tailored advice based on age, risk and local requirements.
Community pharmacists can quickly and easily help people check their vaccination records, provide expert advice and, where appropriate, administer diphtheria‑containing vaccines — often with no appointment required.
PGA's Simon Blacker
Simon said a quick visit to a local pharmacy is particularly important for people who cannot recall their last vaccination, work with vulnerable groups, or are pregnant.
Pharmacists are authorised to administer diphtheria-containing vaccines nationwide, with age eligibility varying:
- All states and territories — vaccination from five years
- Queensland and South Australia — vaccination from birth
- Northern Territory — vaccination from two years
With more than 6,000 community pharmacies operating across Australia — many open evenings and weekends — Simon said access is easier than ever.
“You don’t need to book ahead or wait weeks for an appointment. You can simply walk into your local pharmacy and get advice from a trusted health professional.”
Finding a vaccination provider
People in Australia can locate pharmacies offering vaccination services via findapharmacy.com.au.
Community pharmacists are available for media interviews on diphtheria and adult vaccination.
Sources:
*Australian CDC, using National Notifiable Diseases Surveillance System (NNDSS). The report shows 117 confirmed cases of diphtheria recorded between January 1 and April 27 2026.
**In 2023, 70% of Australian adults (50+ years) were not up to date for tetanus and diptheria boosters: https://www.mja.com.au/journal/2024/221/4/tetanus-pertussis-and-diphtheria-vaccination-coverage-older-adults-australia
