ECDC has published a risk assessment and recommendations to address the ongoing transmission of diphtheria in the EU/EEA, which has disproportionately affected vulnerable populations.
New surveillance updates and guidance for mosquito-borne diseases
As Europe enters the 2025 mosquito season, ECDC is launching surveillance updates and guidance to help public health authorities tackle and monitor mosquito-borne diseases in a timely way.
In 2025, ECDC celebrates 20 years of strengthening Europe’s defences against infectious diseases and protecting the health of over 500 million people across the EU.
Between 2023 and 2025, EU/EEA countries reported 82 cases caused by C. diphtheriae ST574 to ECDC. Of these, at least 25 were in individuals from vulnerable groups.
This issue of the ECDC Communicable Disease Threats Report (CDTR) covers the period 28 June - 4 July 2025 and includes updates on influenza A(H5N1), Middle Eastern Respiratory Syndrome (MERS), SARS-CoV-2, updates on respiratory virus epidemiology in the EU/EEA, poliomyelitis, Crimean-Congo haemorrhagic fever, West Nile virus infection, and chikungunya.
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About ECDC
ECDC collects, analyses and shares data on more than 50 infectious disease topics. ECDC experts assess risks to Europe and provide guidance to help countries prevent and respond to outbreaks and public health threats.
