Rarotonga Dengue Outbreak: Questions for NZ Minister Shane Reti on Pacific Health & Climate Resilience

Dengue Fever Outbreak in Rarotonga Highlights Regional Health Challenges

A recent outbreak of dengue fever in Rarotonga, Cook Islands, is drawing attention to the health resilience of Pacific nations and the role of Aotearoa New Zealand in supporting its neighbors, particularly in the face of climate-linked disease risks. The outbreak, which began to significantly increase in cases at the end of December 2025 and again in January 2026, has prompted health authorities to take action and raises questions about regional preparedness and response capabilities.

Dengue fever is a mosquito-borne viral illness that thrives in warm, humid conditions. As climate patterns shift, the prevalence of dengue is increasing across the Pacific region. The Cook Islands declared a dengue fever outbreak in May 2025, and as of February 8, 2026, more than 500 cases have been recorded. A tragic consequence of the outbreak is the first dengue-related death in the Cook Islands, an elderly patient with underlying health conditions who arrived at the hospital late in the course of the illness.

New Zealand’s Role and Responsibilities

The situation in Rarotonga places a spotlight on the responsibilities of New Zealand, given its close ties to the Cook Islands. Minister for Pacific Peoples, Minister of Science, Innovation and Technology, Minister of Statistics, and Minister for Universities, Shane Reti, is facing scrutiny regarding the level of support New Zealand is providing to manage the outbreak. New Zealand maintains strong constitutional and social connections with the Cook Islands, characterized by frequent travel and close economic and familial bonds. This interconnectedness underscores the importance of coordinated public health responses.

Potential support from New Zealand could include technical assistance, public health expertise, bolstering laboratory capacity, and providing advice on vector control. Crucially, clear communication between health authorities in both countries is essential to prevent further spread and ensure the safety of travelers. As of February 8, 2026, New Zealand had reported 86 cases of dengue, with 75 linked to travel from the Cook Islands, and 40 suspected cases in returning travelers since May 2025.

Addressing the Root Causes: Infrastructure and Climate Change

Beyond immediate response measures, the outbreak highlights the need to address the underlying factors contributing to the spread of dengue fever. These factors are increasingly linked to climate change and require long-term investment in infrastructure and research. Water management systems, urban drainage, housing design, and waste management all play a role in creating or eliminating mosquito breeding grounds. Investment in research related to these areas can contribute to sustainable disease prevention strategies.

Minister Reti’s portfolios in science and universities are particularly relevant in this context. Strengthening the research pipeline into infrastructure resilience could help reduce future outbreaks, not only in the Pacific but also within Aotearoa New Zealand. This includes exploring the potential of advanced technologies, such as real-time data analytics, climate modeling, and AI-driven early-warning systems, to enhance disease surveillance and response capabilities.

Operation Namu-26 and Community Engagement

The Cook Islands health ministry has launched “Operation Namu-26” to raise awareness and promote prevention measures. This initiative includes increased insecticide spraying in affected areas and a nationwide cleanup campaign to reduce mosquito breeding sites. Tourist companies are also being asked to provide dengue prevention items to visitors and to follow ministry guidelines for spraying on their properties.

Health officials are urging anyone experiencing flu-like symptoms, headache, joint or muscle pain, or rash to seek immediate medical attention. Approximately one in four people infected with dengue fever will become sick, experiencing symptoms such as high fever, abdominal pain, nausea, vomiting, and skin rash.

The Broader Pacific Context

The outbreak in Rarotonga is not isolated. Dengue fever outbreaks have also been reported in Fiji, Samoa, and Tonga, with at least one death reported in each of those countries. This underscores the broader regional challenge posed by climate-linked diseases and the need for a coordinated Pacific-wide response.

The dengue outbreak in Rarotonga serves as a critical reminder that climate change is not solely an environmental issue; it is a significant public health challenge. As monitoring continues and response efforts are underway, the situation emphasizes New Zealand’s responsibility to support its Pacific partners in protecting their communities and travelers. The coming weeks will be crucial in determining how effectively New Zealand can leverage its various portfolios – Pacific affairs, science, statistics, and universities – to support both immediate relief and long-term prevention strategies across the region.