Key Points

Chikungunya, Dengue, and Zika

Since May 1, 2026, the following have been identified:

• 131 imported cases of dengue
• 36 imported cases and 10 locally acquired cases of chikungunya
• 2 imported cases of Zika

West Nile virus infections

• As of November 9, 2026, 32 locally acquired human cases of West Nile virus infection have been confirmed in Île-de-France, including 16 neuroinvasive cases and 4 deaths.

Bronchiolitis 

• The Île-de-France region remains in the pre-epidemic phase for bronchiolitis.

Influenza 

• The number of healthcare visits and the proportion of cases related to flu-like syndromes were on the rise in emergency departments (OSCOUR®) and at SOS Médecins between weeks 44 and 45.

COVID-19 

• Emergency department visits: With the end of school break, the number of emergency department visits for suspected COVID-19 increased slightly compared to the previous week, with 127 visits in Week 45 versus 112 in Week 44.
• SOS Médecins: The number of SOS Médecins calls for suspected COVID-19 remained stable in Week 45 compared to the previous week. The decrease in Week 43 was due to a data transmission issue.