Minimal transmission of SARS-CoV-2 from paediatric COVID-19 cases in primary schools, Norway, August to November 2020 Brandal, Lin T and Ofitserova, Trine S and Meijerink, Hinta and Rykkvin, Rikard and Lund, Hilde M and Hungnes, Olav and Greve-Isdahl, Margrethe and Bragstad, Karoline and Nygård, Karin and Winje, Brita A, Eurosurveillance, 26, 2002011 (2021), https://doi.org/10.2807/1560-7917.ES.2020.26.1.2002011