Key Points

Arboviral Diseases 

• New outbreak of locally transmitted chikungunya and
  ongoing circulation in the town of Cavalaire-sur-Mer (Var).
• West Nile virus in 2026 in the Provence-Alpes-Côte d’Azur region: 150% more cases compared to 2025.

Acute Respiratory Infections

In Week 43, ARI activity is at baseline levels in the community and in hospitals (note: no SOS Médecins data available for Week 42).

• Influenza and influenza-like illnesses: baseline level, low activity.
• Bronchiolitis: baseline level, stable activity in emergency departments. Rhinovirus and enterovirus are circulating; these viruses are also responsible for bronchiolitis.
• COVID-19: SARS-CoV-2 is still actively circulating, but the number of emergency department visits for COVID-19 remains lower than last year.

Reportable Diseases

• 50 notifiable cases reported to Santé publique France in September 2026, down from September 2025 (= 62), including hepatitis A (13 vs. 19 cases in October 2025) as well as measles and foodborne illnesses.