GPT and Acute hepatitis: Possible cases based on the earlier ECDC definition and the UK Health Security Agency definition rely on the presence of acute hepatitis, with elevated level(s) of ALT or AST higher than 500 IU/L, among those aged between 11 and 16 years, since 1 January 2022, with epi-linked cases defined as close contacts of a confirmed case since the New Year 2022 [4,8].