Figure 3.

Stochastic simulations. In contrast to the deterministic case, it is possible to attain either of the two stable equilibria with the same initial conditions, (I,M) = (0.5,50). α = 0.06, ν = 0.02, r = 0.05, β₁ = 40, ɛ = 15, δ = 0.15, ρ = 90, κ = 100, M₀ = 100, σ = 3. (a,b) Dashed line, M^*(I); dashed-dotted line, I^* (M); solid line, path.