Prior infection by seasonal coronaviruses, as assessed by serology, does not prevent SARS-CoV-2 infection and disease in children, France, April to June 2020. - Sermet-Gaudelus I; Temmam S; Huon C; Behillil S; Gajdos V; Bigot T; Lurier T; Chrétien D; Backovic M; Delaunay-Moisan A; Donati F; Albert M; et al. (Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2021)