Dynamics of a Stochastic Multigroup SEIR Epidemic Model

Figure 2

Computer simulation of paths 𝐼₁(𝑡), 𝐼₂(𝑡) for the system (18) and its corresponding deterministic model, using the EM method with step size 0.001, with initial values 𝐼₁(0)=1=𝐼₂(0)=1. The full line expresses stochastic model's simulation, and the dotted line expresses the related deterministic model.

(a)

(b)