Key Points

Dengue, Chikungunya, and Zika

• The Paca region is the region in France most affected by local transmission of chikungunya, with a total of 34 outbreaks and 452 cases linked to these outbreaks (+9 cases since the last update). Of the 10 outbreaks still active, 2 appear to remain active. In addition, 13 isolated cases with multiple exposures have been identified in the region.

• Four dengue outbreaks totaling 16 cases (no new cases) have also been identified. All have been closed.

West Nile Virus Infections

• In 2025, the Paca region recorded 29 human cases of West Nile virus infection (+1 case since the last update): 18 in Bouches-du-Rhône, 9 in Var, and 2 in Vaucluse.

Acute respiratory infections

• Influenza and influenza-like illnesses: activity at SOS Médecins and in emergency departments slightly increased, with levels comparable to those observed during the same period last season in both networks.

• Bronchiolitis (under 1 year): activity at SOS Médecins and in emergency departments is down; levels are lower than those observed last season at the same time at SOS Médecins, and comparable in emergency departments.

• COVID-19: low activity levels at SOS Médecins and in emergency departments, comparable to those observed during the same period last season.