Figure 4From: Effects of masks on the transmission of infectious diseasesThe evolution of the susceptible population \((S)\), the exported population \((E)\), the symptomatic infected population \((I)\), the hospitalized population \((H)\), the recovered population \((R)\), and the death population \((D)\) over time with \(\lambda =0.3, 0.5, 0.7, 0.9\). (a): the number of S; (b): the number of D; (c): the number of R; (d): the number of E; (e): the number of I; (f): the number of HBack to article page