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 \(\frac{1}{20 \text { days}}\) |