| from north and south america | 7 | location |
| back to the facility | 7 | other |
| seldom | 6 | degree |
| infection → be → reported | 103 |
| infection → be reported in → addition | 3 |
| infection → be → report | 3 |
| negative | neutral | positive |
| 0.593 | 0.378 | 0.029 |
| Raw frequency | 109 |
| Normalized frequency | 0.592 |
| Modifier score | 0.320 |
| Perplexity | 36.542 |