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

thematic dossier

Acute respiratory infections

Key Points

Acute respiratory infections

  • Activity concentrated between November 2025 and February 2026, with a moderate peak in the city but a high peak in hospitals, occurring in late 2025 and driven primarily by influenza.

Influenza

  • An epidemic driven exclusively by type A viruses occurring between December 2025 and mid-February 2026 (duration: 10 weeks), with low to moderate intensity in the community but high intensity in hospitals, and with a significant impact on mortality observed in early 2026.

Bronchiolitis

  • An epidemic occurring at the usual time of year and of short duration (8 weeks) between November and December 2025, of low intensity and comparable to the 2024–2025 epidemic.

COVID-19

  • Low demand for medical care during the 2025–2026 season despite continued circulation of SARS-CoV-2 in the general population.

In relation to

grippe

Flu

thematic dossier

The flu is a contagious viral respiratory infection that causes seasonal outbreaks every winter. The flu vaccine is the most effective way to protect yourself.

Bronchiolitis

thematic dossier

COVID-19

thematic dossier

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