Key Points

Invasive Meningococcal Infections (IMI)

• In Brittany, 24 cases of IIM were reported throughout 2024. Since the beginning of 2025 and as of February 26, 2025, 17 cases have already been recorded, including 11 in Ille-et-Vilaine.

Influenza and influenza-like illness

• Post-epidemic activity.

• Decline in the monitored epidemic indicators.

Bronchiolitis

• No epidemic activity.

• Decrease in RSV detection according to the Virology Laboratories at Rennes University Hospital and a slight increase according to Brest University Hospital. Other viruses capable of causing bronchiolitis are circulating, notably rhinoviruses.

Pneumonia

• Decrease in visits to hospital emergency departments and calls to SOS Médecins.

• Utilization remains high among adults.

Gastroenteritis

• High activity.

• Indicators show an increase in the number of emergency room visits and SOS Médecins consultations.