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Europe’s mosquito surveillance season is open.
Five national public-health authorities have activated their 2026 monitoring programmes. Here is what each is reporting.
France. Santé publique France runs reinforced arbovirus surveillance from 1 May to 30 November. The 2025 season closed at 48 locally acquired West Nile virus cases, the country’s worst recorded year for autochthonous WNV.
Spain (Andalusia). Andalusia reached 100% trap activation today: 120 sampling points across 109 high-risk municipalities, 43 of them in Sevilla. The season’s first human case is confirmed in Mojácar.
Italy. Istituto Superiore di Sanità (EpiCentro) closed 2025 with 740 West Nile cases and 68 deaths, Europe’s deadliest WNV season on record, alongside 398 chikungunya cases, including the 299-case Modena outbreak.
Portugal. INSA’s REVIVE programme now finds Aedes albopictus in 28 municipalities, eleven more than last year. Madeira’s Aedes aegypti DENV-2 detection is now peer-reviewed in Parasites & Vectors.
Germany. Aedes koreicus is now established in Wiesbaden and across Hesse, and Aedes albopictus has overwintered in Baden-Württemberg. Two invasive vectors, two new German footholds, confirmed by the FLI and the UBA Mückenatlas.
Sources: Santé publique FranceJunta de AndalucíaIstituto Superiore di Sanità (EpiCentro)INSA Portugal (REVIVE)Friedrich-Loeffler-InstitutUmweltbundesamt