HIGHLIGHTS
• Since 1 January 2025, 12 dengue outbreaks have been reported in the Pacific Islands Countries and areas (PICs).
• The following PICs reported dengue o utbreaks in 2025: American Samoa, Cook Islands, Fiji, French Polynesia, Kiribati, Nauru, Samoa, Tonga and Tuvalu. In 2025 there were 21 258 confirmed cases and 21 deaths reported across the Pacific Dengue fatalities were reported in Fiji (n=8), Samoa (n=7), Tonga (n=3), Nauru (n=2) and Kiribati (n=1).
• End of dengue outbreaks in 2025 was declared in Fiji and Tonga in August, and French Polynesia’s two-year surge in November.
• Between 1 January 2026 and 26 June 2026, a total of 4 233 dengue confirmed cases, 167 hospitalisations and 3 deaths have been reported across the Pacific.
• The Pacific Syndromic Surveillance System (PSSS) has reported a total of 7 851 Dengue-like Illness (DLI) cases to date, a lower trend compared to the same period last year.
• In 2026 dengue outbreaks were officially declared in New Caledonia, Tonga and Shefa province Vanuatu.
• The most affected countries and areas this year include: Cook Islands, French Polynesia, Samoa, and New Caledonia. These account for 94% of confirmed cases.
• Dengue serotype-1 (DENV-1) and serotype-2 (DENV-2) are currently in circulation.
• Cook Islands declared the end of its outbreak on 25 May 2026.
As of 26 June 2026:
o Denue outbreak has been declared in Shefa province, Vanuatu.
Confirmation of the serotype is pending.
o Low levels of transmission are observed in American Samoa, Kiribati, New Caledonia, Samoa, and Tonga.
o Wallis and Futuna is under monitoring, as community transmission has recently been reported in Wallis.
