Bronchiolitis

Acute bronchiolitis is a viral respiratory illness that primarily affects children under the age of 2 during seasonal winter outbreaks.

Our Mission

  • Monitor the epidemiological trends of bronchiolitis each year

  • Inform parents about bronchiolitis prevention measures

  • Inform healthcare professionals about the bronchiolitis outbreak weekly during the high-risk period

Data

View data on the epidemiological situation regarding bronchiolitis in France and by region on Santé publique France.

The bronchiolitis surveillance system established by Santé publique France makes it possible to study the epidemiological trends of this viral disease each year throughout France and at the regional level.

For the 2025–2026 season, the agency is implementing an “integrated” surveillance system for acute respiratory infections (ARIs), including COVID-19, influenza, and bronchiolitis (RSV), all reported in a single weekly format. This multi-source surveillance system allows for a better assessment of the public health burden of ARIs and their impact on healthcare provision.

Epidemiological situation of bronchiolitis in mainland France

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17 April 2026

Acute respiratory infections (influenza, bronchiolitis, COVID-19). Review of the 2025–2026 season.

GEODES

Follow the spread of bronchiolitis in France and in your area