Key Points

Dengue, Chikungunya, and Zika

• Since the start of enhanced surveillance (May 1), three imported cases have been identified in the region: one case of chikungunya and two cases of dengue.
• In 2025: 
  • More than 900 reports processed,
  • Significant import pressure, mainly linked to overseas territories (more than 100 cases of chikungunya and 120 cases of dengue),
  • Very active viral circulation in Provence-Alpes-Côte d’Azur (PACA), the most affected region in mainland France (more than 450 locally acquired cases of chikungunya identified).

West Nile virus infections

• No locally acquired cases have been detected in the region, or more broadly in mainland France, since the start of enhanced surveillance (May 1).
• Active viral circulation in Provence-Alpes-Côte d'Azur (PACA), the region most affected in mainland France
  , with 30 locally acquired cases identified.

Pollen and Allergies

• Pollen exposure is low. Allergy-related activity at SOS Médecins is on the rise but remains at a level typical for the season.