As of July 27, 2026, two unrelated autochthonous cases of dengue fever have been identified in the Tarn and Hérault departments (Occitanie).
One autochthonous case of chikungunya has been identified in the Tarn department (Occitanie). This marks the first detection of chikungunya virus circulation in mainland France in 2026.
As of July 27, 2026, two autochthonous cases of West Nile virus infection have been identified in the Pyrénées-Orientales (Occitanie) and Bouches-du-Rhône (Provence-Alpes-Côte d’Azur) departments.
Investigations and prevention and control measures are underway regarding these various incidents.
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