Health Monitoring in the Île-de-France Region. Bulletin of December 3, 2025.

Key Points

Chikungunya, dengue, Zika

Imported cases:

  • 255 dengue

  • 208 chikungunya

  • 1 Zika

Local cases:

  • 2 chikungunya

West Nile virus infections

  • 24 confirmed local human cases of West Nile

Bronchiolitis

  • Epidemic level: Bronchiolitis activity levels stabilized in week 48, reaching a level comparable to those observed last season. Île-de-France has been on epidemic alert for the sixth week.

Influenza and influenza-like illness

  • Elevation to epidemic alert level in Île-de-France for week 48.

COVID-19

  • SOS Médecins: The number of cases involving suspected COVID-19 remained stable in week 48 across all age groups. Case numbers remained low, particularly among children under 15 and adults aged 65 and older.

  • Emergency room visits: The number of emergency room visits for suspected COVID-19 remained stable in week 48 across all age groups. Case numbers remained low.

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