Health Surveillance in Brittany. Bulletin of January 23, 2026.

Key points

Bronchiolitis (under 1 year)

  • End of the epidemic. Decrease in hospital emergency room visits and stable numbers of SOS Médecins consultations. Virology laboratories at the region’s university hospitals report an increase in RSV detection in Rennes and a decrease in Brest. Other viruses capable of causing bronchiolitis are circulating, notably rhinoviruses.

COVID-19

  • Low activity.

Influenza and influenza-like illness

  • Epidemic activity. Decrease in the number of emergency room visits and SOS Médecins consultations for influenza and influenza-like illness. Case numbers are slightly up among children (SOS Médecins) and down among those aged 65 and older. Decrease in the detection of influenza A virus according to data from the virology laboratories at the Rennes University Hospital and the Brest University Hospital.

Gastroenteritis

  • High activity. Increase in the number of SOS Médecins consultations and decrease in the number of emergency room visits across all age groups.

ENT conditions

  • High activity.

Pneumonia

  • Decrease in emergency room visits and SOS Médecins consultations for pneumonia, affecting adults.

Asthma

  • High activity. Stable number of SOS Médecins consultations and increase in emergency room visits across all age groups.

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