Key Points Chikungunya has entered the epidemic phase in Mayotte (Phase 3 of the ORSEC arbovirus plan) since May 27, reflecting intense and widespread transmission of the chikungunya...

Key Points Chikungunya After 5 weeks of intense epidemic activity peaking in Week 17, all indicators have been steadily declining since Week 18, confirming that Réunion is in the...

Key Points At the national level, the number of deaths from all causes reported by INSEE remains within the usual range of fluctuation across all age groups in S20-2025. At the...

Key Points In Week 21 (May 19–25, 2025), activity at SOS Médecins clinics increased compared to Week 20 among 2- to 14-year-olds (+8%, or +1,472 visits) and remained stable in other age...

Key Points In Week 21 (May 19–25, 2025), the number of emergency department visits and hospitalizations following such visits remained stable across all age groups compared to the...

Key Points Local cases No indigenous cases have been identified in mainland France. Imported cases From May 1, the start of enhanced surveillance, through May 27, 2025, the following...

Key points Reunion has been in the epidemic decline phase since Week 17. However, the virus continues to circulate and remains active throughout the island. Although declining, the...

Key Points Chikungunya, Dengue, and Zika Since the start of enhanced surveillance (May 1), 45 imported cases (+12 since the last update) have been identified in the region: 27 cases...

Key Points Dengue, Chikungunya, and Zika 43 cases of dengue, 46 cases of chikungunya, and 1 case of Zika were reported in Île-de-France from May 1 to May 28, 2025. COVID-19 Low and...

Key Points Chikungunya, dengue, and Zika The chikungunya outbreaks in Réunion (and more broadly in the Indian Ocean) and the dengue outbreaks in Guadeloupe are having a significant...