Figure 4.

Effects of the number of communities covered by the interventions and implementation period T _l on R ₀. Random networks with each node has a mean number of 2 neighbours are adopted. The implementation period of interventions varies from 0.1 to 2 years. For each n and T _l, 1000 simulations are implemented. For (a) to (d), $v_{ii}^m=0.55$, $v_{between}^{⁎}=0.45$. The number of communities covered by interventions is (a) n = 5, (b) n = 8, (c) n = 15. (d) The mean value of R ₀ as a function of T _l for each n. (e,f) The mean value of R ₀ as a function of T _l for n = 5, 8 and 10 when $v_{ii}^m=0.3$, $v_{between}^{⁎}=0.7$ and $v_{ii}^m=0.7$, $v_{between}^{⁎}=0.3$, respectively. ${\sigma }_i^m=\mathrm{0.02,}{r}_{ii}^v=r_{ij}^v=\mathrm{2,}{r}_i^{\sigma }=2$. Other parameters are described in Table 1.