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Table 1 Parameters used in the main text

From: Modeling of suppression and mitigation interventions in the COVID-19 epidemics

Parameter

Description

Value (range)

β(t)

Transmission rate with time

\(\beta (t) = \frac {\mathbf {R}_{t}}{\left (\frac {\theta _{a}(1-f_{I})}{\gamma _{A}}+\frac {f_{I}}{\gamma _{I}}+\frac {\theta _{p} f_{I} f_{P}}{\omega }\right)}\)

R0

Basic reproduction number

2.2 [34]

\(\frac {1}{\delta }\)

Incubation period

5.1 days [35]

\(\frac {1}{\gamma _{I}}\)

The infectious period for symptomatic infection

2.3 days [24]

\(\frac {1}{\gamma _{A}}\)

The infectious period for asymptomatic infection

2.3 days [assumed]

fI

The proportion of symptomatic infection

0.8 [36]

\(\frac {1}{\omega }\)

The delay days between severe infection and hospitalization

2.7 days [24]

\(\frac {1}{\mu }\)

Hospital stay period for severe infection

8 days [24]

fP

The propotion of infection requiring hospitalization

0.3 [24]

fD

The proportion of severe infection to die after hospital stay

0.065[calculated] [31]

θa

Infectious factor for asymptomatic infections

1.0 [32]

θp

Infectious factor for severe infections

1.0 [assumed]

Im

Medical resources

0.0023 [calculated] [37]

It

Tolerance parameter for infection

\(\frac {100}{N}\) [assumed]

αs

Suppression coefficient

[0.1,0.4] [assumed]

αm

Mitigation coefficient

[0.5,0.8] [assumed]