Table 3 Attack Rates* of Novel Influenza with Transmissibility of R0 = 1.2, 1.6, and 2.0 without School Closure (baseline) and under Five Types of State School Closure Authority
School Closure Authority | Closure Threshold | Closure Duration | Attack Rates * | ||
|---|---|---|---|---|---|
| Â | Â | Â | R0=1.2 | R0=1.6 | R0=2.0 |
Baseline | None | None | 20% | 36% | 47% |
TYPE I | 1% statewide prevalence, 1-day implementation | 1 week | 19% | 36% | 46% |
| Â | Â | 2 weeks | 19% | 36% | 46% |
| Â | Â | 4 weeks | 19% | 35% | 45% |
| Â | Â | 8 weeks | 14% | 33% | 43% |
| Â | Â | 16 weeks | 2% | 27% | 43% |
TYPE I variation | 0.1% statewide prevalence | 8 weeks | 16% | 35% | 43% |
| Â | 10% statewide prevalence | 8 weeks | 12% | 31% | 44% |
TYPE II | 5 cases per school | 1 week | 19% | 36% | 47% |
| Â | Â | 2 weeks | 19% | 36% | 46% |
| Â | Â | 4 weeks | 19% | 35% | 44% |
| Â | Â | 8 weeks | 14% | 32% | 43% |
| Â | Â | 16 weeks | 2% | 27% | 43% |
TYPE III | 1% prevalence, 3-day delay | 8 weeks | 14% | 32% | 43% |
| Â | 1% prevalence, 5-day delay | 8 weeks | 13% | 31% | 44% |
| Â | 1% prevalence, 10-day delay | 8 weeks | 10% | 33% | 46% |
TYPE IV | Random, 1–3 cases per school | 8 weeks | 16% | 32% | 43% |
|  | Random, 1–5 cases per school | 8 weeks | 15% | 32% | 43% |
|  | Random, 1–10 cases per school | 8 weeks | 16% | 32% | 43% |
TYPE V | 5 cases per school | Random, re-open 1–3 days before 8 weeks | 15% | 32% | 43% |
|  | 5 cases per school | Random, re-open 1–10 days before 8 weeks | 17% | 33% | 43% |
|  | 5 cases per school | Random, re-open 1–20 days before 8 weeks | 18% | 33% | 43% |
|  | 5 cases per school | Random, re-open 1–30 days before 8 weeks | 18% | 33% | 44% |