Figure 9
Impacts of the selection strength β on epidemic dynamics for scale-free networks for small vaccination cost.
Vaccination coverage V (top panels) and epidemic size R (bottom panels) under the two subsidy policies for scale-free networks for c = 0.5 and δ = 0.1, 0.4 and 0.7 (corresponding to the left, central and right panels, respectively). Insets in top and bottom panels show the difference in the vaccination coverage, VP − VF and the difference in the final epidemic size, RP − RF, respectively, between the two subsidy policies, where the blue squares and red circles are simulation results and mean-field based theoretical prediction (Methods), respectively. Other parameters are: N = 1000, λ = 0.18 and average degree 〈k〉 = 6.
