Figure 2

The numerical results of model (2). (a) The graph of the susceptible. (b) The graph of the infected people.(c) The graph of the recovered people. Parameters \(S_{0}=70\), \(I_{0}=50\), \(R_{0}=20\), \(\Lambda =0.0072\), \(\beta =0.002\), \(\nu =0.001\), \(\sigma =0.01\), \(\gamma =0.02\), \(\lambda _{j}=0.047\), \(\epsilon _{j}(y)=0.004, j=1,2,3, \xi =0.9760 <1\).