Key Points

Dengue, Chikungunya, and Zika

• As of October 1, no new locally transmitted cases have been reported in Corsica since week 33. The current tally, which remains unchanged, is 3 locally transmitted chikungunya outbreaks and 18 cases in Corsica.

• In mainland France, 76 episodes of local vector-borne transmission have been identified: 65 episodes of chikungunya (+11 compared to last week) and 11 episodes of dengue (no new episodes compared to last week).

• Finally, since the start of enhanced surveillance (May 1), 5 imported cases of dengue (+2 compared to last week) and 3 imported cases of chikungunya (no new cases compared to last week) have been confirmed in Corsica.

Asthma at the Start of the School Year

• In Corsica during Week 39, asthma-related activity at SOS Médecins among children under 15 continued to rise: 31 medical procedures and a 7.1% share of activity, compared to 26 procedures and a 5.4% share of activity in Week 38. This increase was also observed in emergency departments, with 12 emergency visits and a 3.7% share of activity (compared to 8 visits and a 2.6% share of activity in week 38).

• In both networks, the level of asthma-related care for children under 15 remained broadly similar to that observed in previous years.

Acute Respiratory Infections

• Epidemiological surveillance of acute respiratory infections for the 2025–2026 winter season began on September 29, 2025. The first indicators will be published in the weekly bulletin on October 8.

Mortality

• No excess mortality observed.