Key Points

Dengue, Chikungunya, and Zika

• As of July 15, five locally transmitted cases of chikungunya have been identified in Corsica, linked to the ongoing outbreak in the municipality of Grosseto-Prugna (Southern Corsica). A suspected case, also in the same area, is currently under investigation.

• Meanwhile, eleven other outbreaks of locally transmitted chikungunya cases (+2 since the last update) and one locally transmitted dengue outbreak have been identified on the mainland. The number and early onset of these outbreaks in mainland France confirm the very high risk of numerous areas of local transmission in 2025.

• Since the start of enhanced surveillance (May 1), 3 imported cases of dengue and 3 imported cases of chikungunya have been confirmed (no new cases compared to last week).

Heatwave

• No heat wave is currently underway or expected in Corsica in the coming days. The last heat wave ended on Tuesday, July 8.

• Heat-related activity in emergency services is in line with seasonal expectations and has decreased compared to last week. Only one consultation for a heat-related condition took place at SOS Médecins.