| Event: | EP Epidemic |
| Number: | 2025-000232 |
| Country: | COK Cook Islands |
| Location: | cook islands |
| Date (YMD): | 2025-5-22 |
| Time: | |
| Duration: | 270 |
| Magnitude: | |
| Information Source: | Cook Islands Ministry of Health |
| Comments: | A dengue fever outbreak was officially declared on 22 May 2025 in the Cook Islands. Since the declaration, transmission has remained active and widespread across the main island of Rarotonga and several outer islands, including Aitutaki, Atiu, Mauke, and Mangaia. Cases have been reported in both urban centres and remote communities. As of Epidemiological Week, 6 (6 February 2026), a total of 893 confirmed cases has been recorded. The outbreak has shown a sharp and sustained increase in recent weeks, with an estimated incidence rate of 1.78 per cent of the population. To date, 45 hospital admissions have been reported, along with one fatality in early February 2026. A high proportion of cases are among children, further heightening public health concerns.
Epidemiological trends indicate that the outbreak is currently in a rapid growth phase. With 335 cases recorded in January 2026 and 110 cases already reported in the first epidemiological week of February, transmission is accelerating. If the late-January transmission rate continues, between February and March is projected to represent the peak month, with an estimated 450-650 new cases, followed by a gradual decline in late March assuming intensified vector control measures and rising population immunity begin to limit spread. In a |
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