Case numbers of acute hepatitis of unknown aetiology among children in 24 countries up to 18 April 2022 compared to the previous 5 years van Beek, Janko and Fraaij, Pieter LA and Giaquinto, Carlo and Shingadia, Delane and Horby, Peter and Indolfi, Giuseppe and Koopmans, Marion and Acute hepatitis study group, Eurosurveillance, 27, 2200370 (2022), https://doi.org/10.2807/1560-7917.ES.2022.27.19.2200370