Figure 3

Solutions of deterministic model ( 1.3 ) (blue) and stochastic model ( 1.4 ) (red) with \(\pmb{\Lambda=15}\) , \(\pmb{\beta _{1}=0.002}\) , \(\pmb{\beta_{2}=0.0018}\) , \(\pmb{m=30}\) , \(\pmb{\mu=0.05}\) , \(\pmb{\gamma=0.2 }\) . (a) \(\sigma_{1}=0.1\), \(\sigma_{2}=0.05\), \(\sigma_{3}=0.05\). (b) \(\sigma_{1}=0.02\), \(\sigma_{2}=0.02\), \(\sigma_{3}=0.01\).