Acute respiratory infections (influenza, bronchiolitis, COVID-19). Bulletin dated December 3, 2025.

Key Points

Acute respiratory infections (ARI)

  • A marked increase in activity across all age groups.

Influenza

  • Significant increase in influenza indicators across all age groups. Île-de-France, Normandy, and Nouvelle-Aquitaine have entered the epidemic phase. All other regions in mainland France are in the pre-epidemic phase, except for Corsica. Mayotte has been in the epidemic phase since week 47.

Bronchiolitis

  • Syndromic indicators are rising. Twelve regions in mainland France are in an epidemic phase. Pre-epidemic phase in Guadeloupe and Martinique.

COVID-19

  • Syndromic indicators are generally stable and at low levels. Slight upward trend, but at a low level, in the SARS-CoV-2 monitoring indicator in wastewater.

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