Key Points

Influenza and influenza-like illness: Early onset of the epidemic, particularly in western Brittany. Another sharp rise in SOS Médecins indicators, with a doubling of cases for the third week, accounting for 6% of coded diagnoses. Number of emergency room visits on the rise, exceeding levels observed in previous years. Viral circulation is increasing according to data from the virology laboratory at Rennes University Hospital (positivity rate = 9% out of 78 samples) and decreasing at the virology laboratory at Brest University Hospital (positivity rate = 7% out of 103 samples).

Gastroenteritis: Epidemic activity. Continued increase in SOS Médecins consultations, with activity significantly higher than in previous years (same period), accounting for 8.5% of coded diagnoses across all age groups. Increase in emergency department visits primarily affecting children under 5 years of age; activity across all age groups remains above seasonal averages.Low activity in primary care: incidence rate of acute diarrhea estimated at 137 cases per 100,000 inhabitants (95% CI [65, 209], unconsolidated Sentinelles data). Circulation of Norovirus, Rotavirus, and Adenovirus.

Bronchiolitis (children under 2 years of age): The epidemic continues. Increase in emergency department visits (+49%), accounting for 18% of diagnoses in children under 2 years of age.Increased viral circulation according to data from the virology laboratories at Rennes University Hospital (positivity rate = 22% out of 78 samples) and Brest University Hospital (positivity rate = 11% out of 63 samples).