Table 2 Age-group-specific H1N1 influenza illness attack rates in Ontario, Canada, 2009, and calibrated attack rates
From: Reactive strategies for containing developing outbreaks of pandemic influenza
| Â | Simulated Ontario Illness Attack Rates by the Percentage of Adults 53+ Years Old with Pre-existing Immunity1 | Â | Calibrated Attack Rates (AR) | |||
|---|---|---|---|---|---|---|
Age | 30% | 50% | 70% | Â | Age | AR |
0–4 | 30.6% | 31.0% | 30.8% |  | 0–4 | 29.5% |
5–13 | 53.8% | 55.0% | 55.2% |  | 5–18 | 55.9% |
14–17 | 56.0% | 57.1% | 57.3% |  |  |  |
18–22 | 48.9% | 49.7% | 49.7% |  | 19–52 | 40.8% |
23–52 | 39.6% | 39.8% | 39.3% |  |  |  |
53–64 | 21.7% | 15.3% | 8.8% |  | 53–59 | 14.3% |
65+ | 19.1% | 13.2% | 7.5% | Â | 60+ | 11.0% |
Overall | 36.8% | 35.4% | 33.5% | Â | Overall | 34.1% |