Fig. 1: School contact networks.

Networks of contact through households between 21,608 state-funded schools in England plotted by location. a Network with all school years in attendance. b Network with only primary school years in attendance. c Network with only secondary school years in attendance. Nodes show schools with size determined by the weighted degree of the node (number of unique contact pairs with any other school). Edge widths that indicate the number of unique contact pairs between the schools the edge connects. Red nodes show secondary schools (mean age ≥11 years), blue nodes show primary schools (mean age <11 years). Followed by degree distributions of the networks of contact through households. d A histogram of the number of schools connected by at least one contact pair and e a histogram of the number of unique contact pairs with all other schools in the network including all school years (i.e. that shown in panel a). for all schools (grey) dots, secondary schools (mean age ≥11 years, red circles), and primary schools (mean age <11 years, blue, circles). f A histogram of the number of schools connected by at least one contact pair and g a histogram of the number of unique contact pairs with all other schools in the network including all school years (grey), the network including only secondary school years (blue) and the network including only primary school years (red).