Bronchiolitis, COVID-19, and the flu in the Hauts-de-France region. Bulletin dated December 3, 2025.

Key points

Acute lower respiratory tract infections

  • Increased activity in urban areas at SOS Médecins and within the Sentinelles network, as well as in emergency departments.

Bronchiolitis (< 1 year)

  • Transition to epidemic phase

  • Activity is rising sharply at SOS Médecins and in emergency departments. The circulation of RSV is also increasing.

Influenza and influenza-like illnesses

  • Transition to the pre-epidemic phase

  • Activity is increasing in private practice within the SOS Médecins and Sentinelles networks as well as in emergency departments; levels remain low and comparable to those observed in previous seasons. Increased circulation of influenza viruses.

COVID-19

  • Activity is low and stable in emergency departments and at SOS Médecins.

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