Health Surveillance in Brittany. Bulletin of January 30, 2026.
Key points
Bronchiolitis (under 1 year old)
End of the epidemic. Increase in visits to hospital emergency rooms and SOS Médecins consultations. Virology laboratories at university hospitals in the region report a decrease in RSV detection. 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 the rate of SOS Médecins consultations for influenza and influenza-like illness. Case numbers are declining across all age groups. 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. Decrease in the rate of SOS Médecins consultations and the number of emergency room visits across all age groups.
ENT conditions
High activity. In S04, among children under 5, ENT conditions accounted for 11.0% of emergency room visits (compared to 11.6% in S03) and 48% of SOS Médecins consultations (compared to 45% in S03). Increase in the detection rate of rhinoviruses/enteroviruses by the Virology Laboratory at Rennes University Hospital (positivity rate of 9.3% in S04 compared to 7.1% in S03) and decrease in the detection rate at Brest University Hospital (positivity rate of 4.5% in S04 compared to 9.4% in S03).
Pneumonias
Decrease in emergency room visits and SOS Médecins consultations for pneumonia among adults.
Asthma
High activity. Decrease in SOS Médecins consultations and slight increase in emergency department visits, all ages.
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