French authorities reported a cluster of four autochthonous cases of chikungunya infection in Languedoc-Roussillon region, south of France. This is the first report of autochthonous chikungunya virus transmission in France this year.

Since the beginning of 2018 and as of 14 May, 2 980 autochthonous cases of dengue have been reported in Réunion. The main areas affected are in the western part of the island. The most prevalent serotype among dengue cases is DENV-2 and the main vector implicated in the outbreak is Aedes albopictus.