Fig. 4

Role of children in the spreading of COVID-19. We show the temporal evolution of the fraction of infections among the adults (blue dots) and children (orange dots) in a representative simulation, in the absence of vaccination \(V=0\). The solid curves illustrate the 7-day moving average of the two quantities. In (a), we consider Scenario I (original strain, uniform contagion probability), in which all the individuals have the same per-contact infection probability; in (b), Scenario II (original strain, different contagion probability), in which children have a decreased per-contact infection probability. The parameters used in the simulations are listed in Table 2, \(q_a=0.25\), and \(q_c=0.12\)