Dengue outbreaks reported across Pacific nations

As of March 25, 2025, there are ongoing health concerns related to dengue fever, influenza, pertussis, and avian influenza in the Pacific region. In Tonga, the Ministry of Health reported nine new cases of dengue fever, bringing the total to 348 since the outbreak began on February 19. Most cases are among young people aged 10 to 19. Four hospitalized patients are in stable condition. The current outbreaks are caused by Dengue Virus Type 2. Health authorities are working on mosquito control and public education about prevention. Fiji has recently experienced a dengue-related death. A 23-year-old man died after not seeking medical help. The outbreak, declared in February, involves two dengue serotypes, Types 2 and 3. Health officials are conducting targeted interventions, including surveillance and mosquito control measures. French Polynesia has reported a rising number of dengue cases, with 63 new cases recently identified. The total since late November 2023 stands at 1,384 cases. Additionally, there have been reports of influenza, with 14 new cases and a total of 450 cases since early 2025, showing a decreasing trend. Pertussis cases continue to be a concern in French Polynesia and other areas. In New Caledonia and New Zealand, health officials are monitoring increasing trends in pertussis cases, prompting alerts in both regions. Meanwhile, a child in Cambodia was confirmed to have H5N1 avian influenza after being hospitalized. This case highlights the importance of avoiding contact with sick poultry. Réunion Island is facing a chikungunya epidemic, with thousands of cases reported. Two deaths have been linked to the virus. In response, health authorities recommend vaccination for at-risk individuals. Queensland, Australia, is managing a dengue outbreak in Townsville with nine confirmed cases. Additionally, a new outbreak of highly pathogenic avian influenza has been confirmed in poultry properties in northern Victoria, though there are no human infections reported. Concerns about measles are rising, with outbreaks reported in nearby countries such as Australia and Vietnam. Health authorities in the Pacific are urged to strengthen vaccination efforts and surveillance to prevent outbreaks.