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Table 1 Parameters of the model

From: Infection fatality rate and infection attack rate of COVID-19 in South American countries

Parameter description

Symbol

Value

Time-varying transmission rate

\(\beta (t)\)

Variable

Infectiousness onset rate

\(\sigma\)

\(1/2\,{\mathrm{ day}}^{-1}\)  

Rate of loss of infectiousness

\(\gamma\)

\(1/3\,{\mathrm{ day}}^{-1}\)  

Removal rate of hospitalized cases

\(\kappa\)

\(1/8\,{\mathrm{ day}}^{-1}\)  

Ratio of severe cases out of all infected cases

\(\theta\)

Variable

Proportion of mortality out of severe cases

\(\pi\)

Variable

Proportion of fully protected individuals due to vaccination

\(\eta\)

\(0.85\)

Proportion of susceptible individuals who received COVID-19 vaccine per day

\(\tilde{v }(t)\)

Based on data