HIGHLIGHTS
• Since 1 January 2025, twelve dengue outbreaks have been reported across Pacific Island Countries and Areas (PICs).
• During 2025, dengue outbreaks were reported in American Samoa, Cook Islands, Fiji, French Polynesia, Kiribati, Nauru, Samoa, Tonga, and Tuvalu. A total of 21,258 confirmed cases and 21 deaths were recorded across the Pacific. Fatalities were reported in Fiji (n=8), Samoa (n=7), Tonga (n=3), Nauru (n=2), and Kiribati (n=1).
• Between 1 January 2026 and 2 July 2026, a total of 4 466 dengue confirmed cases, 173 hospitalisations and 3 deaths have been reported across the Pacific.
• The Pacific Syndromic Surveillance System (PSSS) has reported a total of 8 723 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 in 2026 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. • The Cook Islands officially declared the end of its dengue outbreak on 25 May 2026.
• As of 27 July 2026:
o The dengue outbreak remains ongoing in Shefa Province, Vanuatu, with dengue virus serotype 1 (DENV-1) continuing to circulate.
o Low levels of transmission are observed in American Samoa, Kiribati, New Caledonia, Samoa, and Tonga.
o Wallis and Futuna is under monitoring, following recent reports of community transmission in both Wallis and Futuna.
