Key Points

COVID-19

• Trends in S40 vary between emergency rooms and SOS Médecins. In fact, there has been a slight decrease in the number of emergency room visits, while at the same time, SOS Médecins consultations have doubled. However, activity rates in emergency departments and at SOS Médecins remain well below those of previous years during the same period. At SOS Médecins, there is a two-week lag in the increase in activity compared to 2025 (the current rate was reached in week 38 of 2025). According to the virology laboratories at the Brest and Rennes University Hospitals, SARS-CoV-2 circulation has been increasing over the past few weeks but remains low, at around 5% of positive test results.

Bronchiolitis (Under 1 year)

• Non-epidemic activity. As winter surveillance begins, activity related to bronchiolitis remains low in both hospital emergency departments and community settings. The virology laboratories at the two Breton university hospitals have not detected RSV among the respiratory specimens tested. However, other viruses capable of causing bronchiolitis are circulating, notably rhinoviruses.

Influenza and Influenza-Like Illness

• Activity is below epidemic levels. The monitored indicators for influenza and influenza-like illnesses remain low at the start of this winter surveillance period, both in hospital emergency departments and at SOS Médecins. The virology laboratories at the Brest University Hospital (CHRU) and the Rennes University Hospital (CHU) have been sporadically detecting influenza A viruses for the past few weeks.