Key Points

• Bronchiolitis surveillance indicators continue to rise among children under 2 years of age, despite a slight decline linked to the All Saints’ Day school break.

• Very high numbers of emergency department visits and hospitalizations for bronchiolitis, exceeding levels observed during epidemic peaks over the past 10 years.

• In week 44, hospitalizations for bronchiolitis accounted for 50% of hospitalizations following an emergency department visit among children under two years of age. By comparison, this percentage was approximately 40% during the peaks of previous seasons.

• Overall, the epidemic is more severe in the northern half of France

• Possible impact of the circulation of rhinoviruses responsible for bronchiolitis cases.