| Typicality: | 0.271 |
| Saliency: | 0.277 |
| currently | 3 | temporal |
| by the late 1960s | 3 | temporal |
| vaccine → be available to → protect | 20 |
| vaccine → be available to → ensure | 3 |
| negative | neutral | positive |
| 0.256 | 0.584 | 0.160 |
| Raw frequency | 23 |
| Normalized frequency | 0.277 |
| Modifier score | 0.200 |
| Perplexity | 66.710 |