Figure 10.

Scheme of the stages involved in the two-step contagion model considered. The population moves alternatively between the home and the working location. Carriers can infect other people in both places. The cycle consists of a sequence movement → infection → movement → infection. Only some nodes are shown. Color nodes indicate the health state of the corresponding person: susceptible (blue), exposed (yellow), infected (red), recovered (purple). Two nodes are connected if they are close enough to transmit the COVID-19.