Based on data submitted up to 8 October 2025

Epidemiological summary

Since the beginning of 2025 and as of 8 October 2025, three countries in Europe have reported cases of dengue: France (28), Italy (four), and Portugal (two).

Eleven clusters1 were reported by France, two by Italy and one by Portugal. The cluster in Portugal was reported in Madeira, an outermost region of Portugal.

In the past week, France has reported two new locally acquired2 cases of dengue, one in a cluster in Aubagne and one in a new cluster in Roques. Three clusters in France are currently active. No other countries have reported dengue cases in the past week.

Please find the current dengue risk assessment for mainland EU/EEA on ECDC’s dedicated dengue webpage.

Introduction

Dengue is a mosquito-borne viral disease that is increasingly emerging in Europe, with locally acquired cases reported in several EU/EEA countries. In the light of this development, the European Centre for Disease Prevention and Control has implemented seasonal enhanced weekly surveillance to monitor the occurrence of cases in the EU/EEA. The primary objective is to inform public health authorities and support the implementation of appropriate response measures. This includes assessing the risk of dengue transmission through Substances of Human Origin (SoHO).
Dengue is a notifiable disease at the EU level and cases are reported in accordance with the EU case definition. The table and map in this report show the countries and areas where dengue cases – and their corresponding case numbers – have been reported to the European surveillance portal for infectious diseases (EpiPulse Cases).
Please note that cases acquired in Portuguese and Spanish Outermost Regions are included. However, due to the distinct epidemiological situation and differences in surveillance systems, cases acquired in the French Outermost Regions are not included.
Here we present the report as of 8 October 2025.

Overview of dengue cases in the EU/EEA

Countries and regions with locally acquired dengue cases in 2025 till 8 October 2025

*Nomenclature of territorial units for statistics

**Local administrative unit

When importing case_summary.csv in MS Excel, please do not forget to select Unicode (UTF-8) as encoding.

Case summary (.csv)

Spatial distribution of locally acquired dengue cases in 2025 till 8 October 2025

Please follow the link to open the interactive dashboard.

  1. Clusters are epidemiologically- and/or microbiologically-linked cases as defined by national authorities. Clusters can also be single, sporadic cases. Reporting to ECDC is initiated only after a confirmed case is identified in a cluster; probable cases are included only once this condition is met. Clusters are reported as “closed”, 45 days after the last reported date of symptom onset (or any other relevant date when the date of onset is missing). This 45-day period accounts for the estimated time from symptom onset until viraemia levels are sufficient to infect a mosquito (four days), the lifespan of an Aedes mosquito in natural circumstances (23 days) and the maximum intrinsic incubation period (14 days), with an added four-day safety margin for clinical diagnosis of new cases. ↩︎
  2. Cases acquired within the reporting country. ↩︎