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Radio France Internationale
Radio France Internationale
National
RFI

France faces record chikungunya cases as US suspends vaccine licence

A pest control worker targets mosquitos in Bourges, central France, on 14 August 2025, after three residents contracted dengue fever while travelling overseas. Tiger mosquitoes, which are now in most of France, transmit dengue and chikungunya, tropical diseases that have been spreading across the mainland. © Guillaume Souvant/AFP

Mainland France has recorded an unprecedented rise in chikungunya cases this summer as the tiger mosquito spreads across the country. At the same time, US regulators have suspended the licence of a French-made vaccine after reports of serious side effects.

Health authorities have focused on Vitrolles, a suburb of Aix-en-Provence, where 33 locally transmitted cases have been confirmed – the largest outbreak ever seen in mainland France.

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