Dili: A swift, multi-pronged response by the Ministry of Health (MOH) and the World Health Organization (WHO) helped contain a confirmed case of diphtheria in Timor-Leste earlier this year, with no further cases detected in the weeks that followed. The episode, the country's first laboratory-confirmed detection in more than five years, showed how early notification, technical coordination, rapid field action and sensitive community engagement can prevent a single case from escalating into a wider outbreak.
The case involved a five-year-old girl from Bidau-Santana from Dili Municipality, who was admitted to the national hospital HNGV on 13 February with fever, bilateral neck swelling, difficulty swallowing, among other characteristic symptoms. Despite antibiotic treatment and supportive care, she passed away three days later. Polymerase chain reaction testing conducted at a reference laboratory in Darwin, Australia, confirmed the diagnosis on 25 February.
Her immunisation history offered an important clue. While she had received routine vaccines through nine months of age, she had missed her DPT booster scheduled at eighteen months, a gap attributed to disruptions during the COVID-19 pandemic. She had no history of overseas travel.
/countries/timor-leste/dsc_1713.jpg?sfvrsn=1f8578ce_1 "DSC_1713")
Health workers investigating the case (© WHO Timor-Leste)
A single case, a full response
Under WHO guidance, a single laboratory-confirmed case of diphtheria is sufficient to trigger a comprehensive public health response. The disease, though rare in Timor-Leste, spreads through respiratory droplets and can prove fatal in unimmunised populations, making early containment essential.
Within hours of the initial notification on 13 February, MOH working with WHO, convened teams across health emergencies, surveillance, and the Expanded Programme on Immunization, alongside the National Directorate of Disease Prevention and Control. A series of coordination meetings followed, bringing in the Dili Municipal Health Service and the Municipal Rapid Response Team to plan the immediate response. The priorities were contact tracing, prophylaxis, vaccination of those at risk and risk communication.
/countries/timor-leste/dsc_1805.jpg?sfvrsn=1bb1b44_1 "DSC_1805")
WHO Timor-Leste and Ministry of Health teams conduct contact tracing and immunization activities at Sacrojes Pre-School, Becora, as part of the diphtheria response. (© WHO Timor-Leste)
Action across hospital, household and school
The response unfolded across three settings closely linked to the case.
At HNGV, MOH and WHO worked with hospital leadership to brief clinical teams in the paediatric and emergency departments. As a precaution, 19 health workers received the Tetanus and Diphtheria booster, and 15 received antibiotic prophylaxis
In the child's community, an investigation team engaged the family and local leaders with support from the Chefe Suco. While initial conversations with the bereaved family and relatives were difficult, the episode illustrated a crucial lesson in outbreak response: scientific rigour works best when paired with empathy and sensitive community engagement.
The most extensive intervention took place at Sacrojes Pre-School in Becora, where the child had been a student. On March 25, WHO and the MoH first held a session with parents and teachers, many of whom were unfamiliar with diphtheria and its risks.
Two days later, following consent from the school and caregivers, the Becora Rapid Response Team, with support from the Dili Municipality team, MOH and WHO, delivered diphtheria-containing vaccines and azithromycin prophylaxis to 91 students and several teachers.
For many parents, the vaccination activity was a moment of reassurance after the loss of a child from the same school community.
Ferdinan Mau, 43, father of one of the school children, said the incident had made the risk feel real for families. “I am happy my child received the diphtheria and tetanus vaccination. We all now know that diphtheria and tetanus can be dangerous and can even cause death,” he said. He encouraged parents and the wider community to bring their children for vaccination so they can stay protected.
A father holds his son during an immunization drive at Sacrojes Pre-School, Becora (© WHO Timor-Leste)
Marina Ximenes de Jesus, 42, another parent at the school, thanked the government for providing vaccines to children and protecting them from diseases that could affect them in the future. “Vaccination is a responsibility that extends beyond children,” she said, making a case for adult vaccination too. “I get vaccinated as well because it protects me from diseases. When parents stay healthy, we can better protect and care for our children,” Ximenes de Jesus said.
Lessons and the road ahead
Dr Arvind Mathur, WHO Representative said the Timor-Leste experience demonstrated how timely notification, technical coordination, and community engagement can contain a high-consequence pathogen before it gains a foothold. He said the case also served as a reminder that immunisation gaps left by the pandemic continue to surface from time to time. “Strengthening routine immunisation and catch-up campaigns remain an important priority, both for Timor-Leste and the wider region,” he said.