Cook Islands Dengue Outbreak: Death Reported & Travel Warning

The Cook Islands is confronting a growing dengue fever outbreak, marked by its first reported fatality on February 2nd. The death involved an elderly patient with pre-existing health conditions who presented to the hospital late in the course of the illness. This development comes as authorities work to contain a surge in cases affecting both residents, and visitors.

Rising Cases and Public Health Response

More than 500 cases of dengue have been recorded in the Cook Islands since an outbreak was declared in May 2025. A significant increase in infections was observed on Rarotonga at the close of both December 2025 and January 2026. Cases have now been identified across multiple islands, including Rarotonga, Aitutaki, Atiu, Mauke, and Mangaia.

Did You Know? Dengue fever is transmitted to people through the bite of Aedes aegypti mosquitos.

Operation Namu-26

In response to the escalating situation, the Cook Islands health ministry has launched “Operation Namu-26.” This initiative focuses on raising public awareness about dengue prevention and implementing control measures. These measures include increased insecticide spraying and a nationwide effort to eliminate potential mosquito breeding grounds by removing standing water.

Impact on Travelers

The outbreak is also impacting travelers, with 75 out of 86 reported dengue cases in New Zealand linked to travel to the Cook Islands. Tourist companies are now actively participating in prevention efforts, providing dengue prevention items to visitors and conducting spraying on their properties in accordance with ministry guidelines.

Expert Insight: The spread of dengue fever highlights the interconnectedness of global health and the importance of proactive measures to protect both local populations and international visitors.

Individuals experiencing flu-like symptoms, headaches, joint or muscle pain, or a rash are urged to seek immediate medical attention to ensure timely care.

Understanding Dengue Fever

According to Dr. Maryann Heather, a clinician and lecturer at the University of Auckland, approximately one in four people infected with dengue fever will become ill. Symptoms can range from headaches and abdominal pain to high fever and severe muscle and joint pain. The disease poses a greater risk to young children and the elderly.

Frequently Asked Questions

What are the symptoms of dengue fever?

Symptoms include headaches, pain behind the eyes, abdominal pain, nausea, vomiting, muscle pain, joint pain, skin rash, lethargy, tiredness, and high fever.

What should I do if I think I have dengue fever after traveling to the Cook Islands?

You should seek medical attention immediately, especially if your symptoms are not improving or if you are concerned.

Which islands in the Cook Islands are currently affected by the dengue outbreak?

Cases have been found on the islands of Rarotonga, Aitutaki, Atiu, Mauke and Mangaia.

As the outbreak continues, authorities may consider further measures to control the spread of the virus. Travel advisories could be updated, or that additional resources will be allocated to prevention and treatment efforts. The situation will likely remain fluid as health officials monitor case numbers and assess the effectiveness of current interventions.