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Multiple early local transmissions of chikungunya virus, Mainland France, from May 2025
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View Affiliations Hide AffiliationsLucie Fournierlucie.fournier santepubliquefrance.fr
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Investigation team: Delphine Casamatta, Anne Guinard, Nadège Marguerite, Gisèle GayView Citation Hide Citation
Citation style for this article: . Multiple early local transmissions of chikungunya virus, Mainland France, from May 2025. Euro Surveill. 2025;30(32):pii=2500545. https://doi.org/10.2807/1560-7917.ES.2025.30.32.2500545 Received: 25 Jul 2025; Accepted: 13 Aug 2025
Abstract
In 2025, a large outbreak of chikungunya occurred in Réunion Island (France). By 10 July, 1,911 imported cases were notified in Mainland France, most (89%) were associated with travel to Réunion Island. Ten autochthonous outbreaks in five French regions involving 27 cases were identified between May and mid-July and outbreaks occurred earlier than in previous years. Aedes albopictus, the mosquito vector, is endemic in large parts of France. Transmission events early in the vector active season is concerning.

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