Parameter

Meaning

Range

${\beta }_i$

Transmission rate

0 - 1

${\rho }_i$

Infectiousness reduction in asymptomatic

0.2 - 0.5

$a_i^{-1}$

Average “incubation” period (days) text

2 - 12

${\gamma }_{I\mathrm{,}i}^{-1}$

Average symptomatic infectious period (days)

2 - 6

${\gamma }_{A\mathrm{,}i}^{-1}$

Average asymptomatic infectious period (days)

2 - 5

$p_i$

The probability of being asymptomatic text

0.05 - 0.25