TY - RPRT T1 - Prevalence and incidence of antibodies against SARS-CoV-2 in children and school staff measured between December 2020 and June 2021: Findings of the second testing period – brief summary Y1 - 2021 A1 - Els Duysburgh A1 - Joanna Merckx A1 - Milena Callies A1 - Ines Kabouche A1 - Mathieu Roelants A1 - I Desombere KW - CHILDREN KW - COVID-19 KW - SARS-CoV-2 KW - Schools KW - sero-prevalence PB - Sciensano CY - Brussels, Belgium ER -