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Prevalence and incidence of antibodies against SARS-CoV-2 in children and school staff measured between December 2020 and December 2021: Findings of the fifth testing period ? brief summary, Merckx, Joanna, Roelants Mathieu, Callies Milena, Desombere I, Kabouche Ines, and Duysburgh Els , (2022)\par \par }