| commonly | 12 | degree |
| mostly | 8 | degree |
| typically | 3 | degree |
| virus → be found in → africa | 35 |
| virus → originate in → africa | 9 |
| virus → occur in → africa | 8 |
| virus → have → central african | 4 |
| virus → be in → africa | 3 |
| negative | neutral | positive |
| 0.544 | 0.435 | 0.021 |
| Raw frequency | 59 |
| Normalized frequency | 0.531 |
| Modifier score | 0.850 |
| Perplexity | 65.195 |