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. 2021 Sep 23;152:111458. doi: 10.1016/j.chaos.2021.111458

Table 2.

Description of model parameters.

Parameter Description
N Total population
β(t) Transmission rate - contact rate × transmission probability
ηA Infectiousness of asymptomatically infected individuals
relative to symptomatically infected individuals
ηH Infectiousness of hospitalized individuals relative to
symptomatically infected individuals
ϵi Inward mask efficiency
ϵo Outward mask efficiency
βf Rate of fear-induced behavior change
λ3 Exponential delay factor for fear-induced behavior change
μf The rate at which aware masked susceptible individuals
move to unmasked susceptible individuals
σ The rate at which exposed individuals move to symptomatic
or asymptomatic infected compartments
(reciprocal of the incubation period)
f The probability of an infected individual being asymptomatic
θ(t) The rate at which individuals in the IU compartment
move to the IM compartment
ϕ The rate at which symptomatically infected individuals move
to the hospitalized compartment
ν The rate at which critical hospitalized individuals
are admitted to the intensive care unit
γI The recovery rate of symptomatically infected individuals
γA The recovery rate of asymptomatically infected individuals
γH The recovery rate of hospitalized individuals
γICU The recovery rate of individuals in the ICU compartment
δI The mortality rate of symptomatically infected individuals
δA The mortality rate of asymptomatically infected individuals
δH The mortality rate of hospitalized individuals
δICU The mortality rate of individuals in the ICU compartment