Daily testing for contacts of individuals with SARS-CoV-2 infection and attendance and SARS-CoV-2 transmission in English secondary schools and colleges: an open-label, cluster-ran... von Young, BC, Eyre, DW, Peto, TEA, Kendrick, S, White, C, Smith, S, Beveridge, G, Nonnenmacher, T, Ichofu, F, Hillier, J, Oakley, S, Diamond, I, Rourke, E, Dawe, F, Day, I, Davies, L, Staite, P, Lacey, A, McCrae, J, Jones, F, Kelly, J, Bankiewicz, U, Tunkel, S, Ovens, R, Chapman, D, Bhalla, V, Marks, P, Hicks, N, Fowler, T, Hopkins, S, Yardley, L