Communicable disease threats report, 21 - 27 February 2026, week 9

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 ECDC Communicable Disease Threats Report (CDTR) covers the period 21 - 27 February 2026 and includes updates on respiratory virus epidemiology in the EU/EEA, mass gathering monitoring, chikungunya, cholera, and swine flu.