Steady-state disease density with respect to contact radius r_c and the effective infection rate λ in the case r_s = 0 (a) and r_s = 1.25 (b). The parameters of the model are N = 200, L = 20, v = 0.05, ρ = 0.5, λ = 2, p_jump = 0, μ = 0, and σ = 0. The results are averaged over 10 runs.