Health Surveillance in the Île-de-France Region. Bulletin of February 25, 2026.

Key points

Lower Respiratory Tract Infections

  • In hospitals: The activity rate in emergency departments for acute lower respiratory tract infections (ALRTIs) continued to decline, accounting for 2.7% of total activity (-0.2 percentage points). The number of emergency department visits for ALRTIs also continued to decrease, with 1,846 visits (-12.0%).

  • In the community: At SOS Médecins, the number of procedures also declined, with 1,281 procedures (-10.3%). The activity rate for lower respiratory tract infections decreased to 11.1% (-0.6 percentage points)

Influenza and Influenza-Like Illness

  • Indicators for influenza-like illnesses were sharply down across all age groups, both in private practice and in hospitals. In emergency departments, visits for influenza-like illnesses accounted for less than 1% of activity. In SOS Médecins data, the share of activity for influenza-like illnesses accounted for less than 5% of procedures.

  • End of the flu epidemic in Île-de-France.

COVID-19

  • SOS Médecins: the number of cases involving suspected COVID-19 increased in S08. This trend reflected an increase among those aged 15 and older. Case numbers remained low.

  • Emergency room visits: The number of emergency room visits for suspected COVID-19 decreased in Week 8 across all age groups. Case numbers remained low.

  • SARS-CoV-2 in wastewater: the overall upward trend in SARS-CoV-2 circulation levels in wastewater continued in Week 8, although the situation remained heterogeneous (6 of the 7 wastewater treatment plants have interpretable results).

Acute gastroenteritis

  • In general, indicators related to gastroenteritis in emergency departments and primary care show irregular trends in Île-de-France, with an overall upward trend across all age groups, as expected for this time of year.

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