Fig. 3
From: Discussing the epidemiology of COVID-19 model with the effective numerical scheme
Numerical simulation for model (1) by using NSFD scheme with \(\left(\text{a}\right)\Psi = 0.1, \left(\text{b}\right)\Psi = 1,\left(c\right)\Psi =10,\left(d\right)\Psi =30 .\)(a–c) Stable DFE point with \({\tau }_{1}=0.005\) (d) Unstable DFE point \({\tau }_{2}=1.05\) Other parameters stay stable as Table 1.
