Key Points Since January 1, 2025, 828 cases of measles have occurred and been reported (an increase of 23 new cases in August). The surge in cases observed since January has been...

Key points Chikungunya, dengue 182 imported cases of dengue 169 imported cases of chikungunya 1 imported case of chikungunya in a Paris resident West Nile virus infections Three...

Key Points In the Grand Est region, 45 imported cases of chikungunya, 34 imported cases of dengue, and 2 imported cases of Zika virus infection were identified between May 1 and...

Key Points In Occitanie, from May 1 to September 10, 2025, the following were identified: 86 imported cases of dengue, 99 imported cases of chikungunya, and 1 imported case of Zika 46...

Key Points Chikungunya, dengue, Zika Seven episodes of local transmission detected: Five outbreaks of local transmission of chikungunya identified in the region as of September 9, 2025,...

Key Points Dengue Over the past two weeks, dengue activity in the region remained low, with a total of 8 confirmed cases (4 in week 35 and 4 in week 36). Of these, 3 were from the...

Key Points Chikungunya, Dengue, and Zika Indigenous cases As of September 8, 2025, 49 episodes of indigenous vector-borne transmission have been identified in mainland France: 38...

Key Points In week 36 of 2025 (September 1–7, 2025), an increase in emergency department visits for asthma among children under 15 was observed in emergency departments and at SOS...

Key Points Dengue, Chikungunya, and Zika As of September 10, no new episodes of local transmission have been detected on the island compared to last week, nor have any new local cases...

Key Points In the Indian Ocean region, in Week 36—the third week of the school year in Réunion—the number of emergency department visits for asthma among children under 15 continued to...