Figure 4

Impact of diagnosis ratio on the effectiveness of school closure activation trigger for R ₀ = 1.5. Outcomes of the activation trigger that would give the maximum reduction in attack rate (as Optimal trigger given in Table 3 assuming 50% diagnosis ratio) and the activation trigger at a single symptomatic case (Single case trigger) for individual school closure (ISC) and simultaneous school closure (SSC) strategies in relation to diagnosis ratio (% of symptomatic cases) are shown. The outcomes are reported in percentage of the simulated population size for the epidemics with R₀ values of 1.5 regarding school closure durations of 2, 4 and 8 weeks.