Fig. 1.

Left-hand column shows simulation of compartments $S\left(t\right),V\left(t\right),$ and $I\left(t\right)$ in deterministic system (1.1) and stochastic system (1.3) with noise intensities $({\sigma }_1,{\sigma }_2,{\sigma }_3)=(0.0008,0.0004,0.0008)$ and main parameters $(\Lambda ,\beta ,\mu ,\alpha ,\delta ,\gamma ,\vartheta )=(0.8,0.4,3\times {10}^{-5},0.00457,0.05,0.2,0.4),$ respectively. Right-hand column shows frequency histogram and corresponding marginal density function curves of individuals $S,V,$ and $I$.