Key Points

Dengue, Chikungunya, and Zika

• Since the start of enhanced surveillance (May 1), 58 imported cases (+13 since the last update) have been identified in the region: 33 cases of chikungunya, 24 cases of dengue, and 1 case of Zika.

• While the chikungunya outbreaks in Réunion and the dengue outbreaks in the Antilles continue to impact surveillance in mainland France, the decline in viral circulation in these territories, particularly in Réunion, is reflected in the number of imported cases reported in recent days.

West Nile

• No indigenous cases have been detected in the region, or more broadly in mainland France, since the start of the enhanced surveillance period (May 1).

• A look back at 2024:

  • Significant circulation in mainland France, mainly in the Var and the greater Camargue

  • Circulation similar in number of human cases to that of 2023, but with a different geographical distribution (Nouvelle-Aquitaine in 2023 and Provence-Alpes-Côte d’Azur in 2024)

  • Intense but spatially limited circulation in the Var (southwest of the department)

  • Circulation was also significant across Europe, with lower intensity than in 2018 but a record number of affected regions.

Exposure to pollen, which may pose an allergy risk

• In the Paca region, the pollen index, established by Atmo France and accredited air quality monitoring associations, is at a high level, primarily due to grass pollen.

• Allergy-related activity at SOS Médecins clinics is high.