| prior to paralysis | 12 | temporal |
| after infection | 4 | temporal |
| usually | 2 | degree |
| virus → be found in → blood | 296 |
| virus → be present in → the blood | 29 |
| virus → be found in → the blood | 10 |
| virus → be present in → blood | 7 |
| virus → be in → the blood | 5 |
| virus → be present in → their blood | 4 |
| virus → live in → blood | 3 |
| negative | neutral | positive |
| 0.786 | 0.202 | 0.012 |
| Raw frequency | 354 |
| Normalized frequency | 0.851 |
| Modifier score | 0.267 |
| Perplexity | 60.125 |