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Illustration of the parameters involved in model (1)
| Parameters | The physical interpretation |
|---|---|
| P(t) | Susceptible compartment |
| I(t) | Infected compartment |
| R(t) | Removed compartment due to death by infection or natural |
| a | The recruitment rate |
| d | Natural death |
| δ | Death due to corona |
| b | The immigration rate of infected individuals |
| μ | Infected population goes to recovered |
| σ | The infection rate |
| γ | The rate at which the recovered individuals lose immunity |
| α | The recovery rate |
