Skip to main content
. 2020 Aug 5;148:e166. doi: 10.1017/S0950268820001740

Table 1.

State variable description

Variable Description
S Susceptible individuals
E1 Exposed individuals
E2 Individuals in the pre-symptomatic transmission stage during the incubation period
I1 Individuals that are between onset symptoms and presentation to health care stage
I2 Individuals with confirmed COVID-19 case and infections
I3 Individuals asymptomatic
R Recovered class
D Individuals who died from COVID-19
C Cumulative COVID-19 importations
H Cumulative symptomatic COVID-19 cases