Seed premises size | Number unique premises in small epidemics (seed) | Number unique premises in large epidemics (seed) | Proportion outbreaks resulting in large epidemics |
---|---|---|---|
Small (≤ 100,000 birds) | 35 | 20 | 0.57 |
Medium (100,000 - 200,000 birds) | 59 | 17 | 0.29 |
Large (> 200,000 birds) | 141 | 37 | 0.26 |