Communicable disease threats report, 24-30 May 2025, week 22

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 24-30 May 2025 and includes updates on SARS-CoV-2 variant classification, hepatitis A, chikungunya, mass gathering monitoring for the Hajj, and risk assessment on hepatitis A under production.