Communicable disease threats report, 15 -21 November 2025, week 47

The ECDC Communicable Disease Threats Report (CDTR) is a weekly bulletin for epidemiologists and health professionals on active public health threats. This issue of the CDTR covers the period 15 - 21 November 2025 and includes updates on respiratory virus epidemiology in the EU/EEA, chikungunya, West Nile virus, dengue, Ebola, hepatitis A, Rift Valley Fever, Marburg virus disease (MVD), influenza A(H5N5), infant botulism, influenza A(H5N1), and mass gathering monitoring for the Jubilee of 2025 in Italy.