Table 1.
Onset disease dissemination in space (number of zones involved).
| DIS criteria | Percentage |
|---|---|
| 1 out of 4 | <1% (1) |
| 2 out of 4 | 15% (7) |
| 3 out of 4 | 35% (16) |
| 4 out of 4 | 49% (23) |
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