Ulyte, A., Haile, S.R., Blankenberger, J., Radtke, T., Puhan, M.A. and Kriemler, S. 2022. SARS-CoV-2 seroprevalence in children, parents and school personnel from June 2020 to April 2021: cohort study of 55 schools in Switzerland. Swiss Medical Weekly. 152, 2324 (Jun. 2022), w30193. DOI:https://doi.org/10.4414/SMW.2022.w30193.