Key Points

Bronchiolitis in Children Under 1 Year of Age

• No outbreak in the Pays de la Loire region.

Influenza and flu-like illness

• No outbreak in the Pays de la Loire region.

COVID-19

• Healthcare utilization indicators are at a low level, comparable to the level observed during the previous season.

Acute gastroenteritis

• Healthcare utilization (SOS Médecins visits and emergency department visits) for acute gastroenteritis remained at low levels.

West Nile

• In the Pays de la Loire region, 15 locally acquired human cases have been reported in recent weeks (6 cases in Loire-Atlantique, 4 cases in Maine-et-Loire, 4 cases in Vendée, and 1 case in Mayenne). In addition, several equine cases have also been detected in the region (in Loire-Atlantique, Maine-et-Loire, and Vendée), as well as several avian cases (in Loire-Atlantique, Maine-et-Loire, and Vendée).
• The simultaneous presence of human, equine, and avian cases indicates active circulation of the West Nile virus in these departments.

Chikungunya, Dengue, Zika

• Since May 1, 2026: 33 imported cases of dengue, 3 imported cases of chikungunya, and 1 imported case of Zika have been reported in the Pays de la Loire region.
• No locally acquired cases of dengue, chikungunya, or Zika have been reported in the region.