Chikungunya, Dengue, Zika, and West Nile Virus in mainland France. Enhanced Surveillance Bulletin of July 16, 2026.
Key Points
Chikungunya, Dengue, and Zika
Indigenous Cases
No locally acquired cases have been identified in mainland France.
Imported cases
From May 1, when enhanced surveillance began, through July 12, 2026, the following cases were identified:
- 69 imported cases of chikungunya
- 215 imported cases of dengue
- 9 imported cases of Zika
West Nile virus infections
Autochthonous cases
As of July 16, 2026, one locally acquired case of West Nile virus infection was identified in the Pyrénées-Orientales (Occitanie). This is the first detection of the virus circulating in humans in France in 2026.
In relation to
Dengue
thematic dossier
Dengue fever is a viral disease transmitted by mosquitoes of the genus Aedes. The most common symptoms are fever and joint pain. Its complications can be severe.
Chikungunya
thematic dossier
Chikungunya is a viral disease transmitted by mosquitoes of the genus Aedes. The most common symptoms are fever and joint pain.
West Nile virus
thematic dossier
West Nile virus is an arbovirus primarily transmitted by mosquitoes that can cause neurological disorders in humans. It is a virus found in birds, but it can also infect humans and horses. In...
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