New Caledonia has recorded more than 640 probable and confirmed dengue infections so far in 2026 as health authorities warn the French Pacific territory is in an active epidemic phase that began in late March.
Officials say weekly case counts began rising steadily from February, with particularly high numbers reported during epidemiological weeks 11 to 13, indicating sustained community transmission across the islands. Authorities have issued a red alert for the DENV‑1 serotype and are urging heightened vigilance and immediate preventive measures.
Transmission is currently most intense outside the Greater Nouméa area. Case numbers in the Greater Nouméa municipalities of Dumbéa, Mont-Dore, Nouméa and Païta have remained comparatively lower and more stable, public health officials attribute in part to the World Mosquito Programme’s ongoing releases of Wolbachia‑infected Aedes aegypti mosquitoes. The programme’s interventions have significantly reduced the mosquitoes’ ability to transmit dengue in treated urban zones, officials said, a factor that appears to be moderating spread inside the capital zone even as peripheral areas see sharper increases.
The red alert for DENV‑1 underscores the immediate public health priority of reducing mosquito exposure and intensifying surveillance. There is no dengue vaccination campaign under way in New Caledonia. Although the Qdenga vaccine is authorised in the European Union — and therefore in France — it is not routinely offered locally through the Directorate of Health and Social Affairs, leaving vector control and personal protection as the main lines of defence.
The outbreak also has regional travel implications. About 60,000 travellers visited New Caledonia in 2025, and on April 11 the US Centers for Disease Control and Prevention advised travellers to take their usual precautions against mosquito bites, noting that dengue vaccines are not available in the United States. Health authorities in New Caledonia have reiterated the importance of repellents, protective clothing, window screens and prompt removal of standing water to limit mosquito breeding.
The situation marks an escalation from sporadic case patterns earlier in the year to an active epidemic requiring broader public engagement and targeted control measures. The contrast between treated urban zones and outlying districts highlights both the potential impact of Wolbachia programmes and the continuing challenges of extending effective vector control across the territory. Source: New Caledonia Times.
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