Table 1.

Description of the model variables.

Variable	Description
$S$	Susceptible individuals
$E$	Exposed individuals
$P_1$	Pre-symptomatic individuals who are not (yet) tested
$P_2$	Pre-symptomatic and tested individuals who are isolated
$M_1$	Mildly infectious individuals who are not tested
$M_2$	Mildly infectious and tested individuals who are isolated
$G$	Mildly infectious individuals who are isolated
$I_1$	Severely infectious individuals who are not yet hospitalized
$I_2$	Infectious individuals who are hospitalized due to severe symptoms
$R$	Recovered individuals