The European Centre for Disease Prevention and Control (ECDC) has published 2020 epidemiological reports for:
Chikungunya virus disease - 24 countries reported 59 cases in the EU and EEA, of which 52 (88%) were confirmed. The was the lowest number of cases reported at the EU or EEA level since 2016, with a notification rate of less than 0.1 cases per 100,000 of the population. A total of 49 (83%) of cases were among those aged 25 to 64 years, the majority of cases were likely infected in either Thailand or Brazil. No autochthonous transmission of chikungunya virus occurred within the EU or EEA in 2020.
Dengue - 26 countries reported 1,957 cases of dengue in the EU and EEA, of which 1,820 (92%) were confirmed, with a notification rate of 0.5 cases per 100,000 of the population. From 2016 to 2020, no obvious trend in the number of cases could be identified. Of the cases with known probable country of infection, 79% were imported from the Americas, mostly from Martinique and Guadeloupe. In total, 24 autochthonous dengue cases were reported from the EU or EEA, 13 by France and 11 by Italy.
Sources: ECDC, 5 April 2022 and ECDC, 5 April 2022