| from the army medical school | 8 | location |
| from human babies | 5 | other |
| from a pre-qualified manufacturer | 4 | other |
| vaccine → be → obtained | 25 |
| vaccine → be → procured | 9 |
| vaccine → be → extracted | 4 |
| negative | neutral | positive |
| 0.176 | 0.636 | 0.187 |
| Raw frequency | 38 |
| Normalized frequency | 0.346 |
| Modifier score | 0.967 |
| Perplexity | 50.457 |