Table 2. Summary of variables of the model [Eqs (1) and (2)] and their respective time scales.

Variable name	incubation time	details
h		density of susceptible (healthy)
b	${\gamma }_0^{-1}=2\text{days}$	density of exposed
w	${\gamma }_1^{-1}=3\text{days}$	density of pre-symptomatic and infectious
f	${\gamma }_2^{-1}=13.6\text{days}$	density of symptomatic and infectious
r		density of recovered
n		density of total population