Health Monitoring in the Île-de-France Region. Bulletin of October 1, 2025.

Key points

Chikungunya, dengue

Imported cases:

  • 204 dengue

  • 180 chikungunya

  • 1 Zika

Local cases:

  • 2 chikungunya

West Nile virus infections

  • 8 confirmed local human cases of West Nile

Flu-like syndromes and acute respiratory infections

  • Activity related to influenza and influenza-like illnesses remained at baseline levels.

  • The number of hospital visits for flu-like illness increased in urban hospitals. The number of hospitalizations following emergency department visits was on the rise.

  • Regarding virological surveillance, the number of influenza virus infections remained very low.

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