Dengue risk assessment for mainland EU/EEA

Since the beginning of 2026 and as of 05 August 2026, only France has reported a locally acquired case of dengue in Europe.

The likelihood of onward transmission of dengue virus in mainland Europe is linked to importation of the virus by viraemic travellers into receptive areas with established and active competent mosquito vectors (e.g. Aedes albopictus and Aedes aegypti). The Aedes albopictus mosquito is established in a large part of Europe. In Europe and neighbouring areas, the Aedes aegypti mosquito is established in Cyprus, on the eastern shores of the Black Sea, and in the outermost region of Madeira.

The environmental conditions in most areas of the EU/EEA where Ae. albopictus or Ae. aegypti are established are now favourable for mosquito activity and virus replication in mosquitoes; therefore, locally acquired dengue cases may occur in the coming weeks.

For more information on the risk related to dengue in mainland EU/EEA, please see ECDC's dengue risk assessment for mainland EU/EEA.

Additional information on locally acquired dengue cases in 2026 in the EU/EEA is available in ECDC's seasonal surveillance reports for dengue, and in ECDC's factsheets on dengue.

Mosquito-bite prevention is strongly recommended for travellers to countries with reported cases of dengue. Travellers to areas with active outbreaks or elevated risk should follow travel health advice. Pregnant travellers, older adults and people with chronic conditions may be at higher risk of complications associated with dengue.