Table 1 Description of model parameters
From: SEIR model for COVID-19 dynamics incorporating the environment and social distancing
Model parameter name | Symbol | Value |
|---|---|---|
Birth rate of the human population | b | 0.00018 days\(^{-1}\) |
Natural human death rate | \(\mu \) | \(4.563\times 10^{-5}\) days\(^{-1}\) |
Human life expectancy | \(\frac{1}{\mu }\) | 21915 days or 60 years |
Natural death rate of pathogens in the environment | \(\mu _P\) | 0.1724 days\(^{-1}\) |
Life expectancy of pathogens in the environment | \(\frac{1}{\mu _P}\) | 5.8 days |
Proportion of interaction with an infectious environment | \(\alpha _1\) | 0.10 |
Proportion of interaction with an infectious individual | \(\alpha _1\) | 0.10 |
Rate of transmission from S to E due to contact with P | \(\beta _1\) | 0.00414 |
Rate of transmission from S to E due to contact with \(I_A\) and/or \(I_S\) | \(\beta _2\) | 0.0115 |
Proportion of symptomatic infectious people | \(\delta \) | 0.7 |
Progression rate from E back to S due to robust immune system | \(\psi \) | 0.0051 |
Progression rate from E to either \(I_A\) or \(I_S\) | \(\omega \) | 0.09 |
Death rate due to the coronavirus | \(\sigma \) | 0.0018 |
Rate of recovery of the symptomatic population | \(\gamma _S\) | 0.05 days\(^{-1}\) or \(\frac{1}{20 \text { days}}\) |
Rate of recovery of the asymptomatic human population | \(\gamma _A\) | 0.0714 days\(^{-1}\) |
Rate of virus spread to environment by symptomatic infectious individuals | \(\eta _S\) | 0.1 days\(^{-1}\) or \(\frac{1}{10 \text { days}}\) |
Rate of virus spread to environment by asymptomatic infectious individuals | \(\eta _A\) | 0.05 days\(^{-1}\) or \(\frac{1}{20 \text { days}}\) |