Key Points

Pollen and Allergies

• Pollen exposure was low across the entire island.
• Allergy-related activity at SOS Médecins decreased slightly, remaining high but at a level
  typical for the season.

Dengue, Chikungunya, and Zika

• Enhanced surveillance in mainland France began on May 1.
• The 2025 report for Corsica and at the national level is presented in this bulletin.

West Nile virus infections

• Enhanced surveillance in mainland France began on May 1.