| protect against tetanus | 0.59 |
| protect against diphthe… | 0.48 |
| prevent pertussis | 0.39 |
| tetanus toxoid | 0.53 |
| diphtheria toxoid | 0.48 |
| similar ingredients | 0.25 |
| safe | 0.37 |
| effective | 0.34 |
| dangerous | 0.22 |
| 100% effective | 0.00 |
| indicated | 0.52 |
| introduced | 0.39 |
| covered by the program | 0.31 |
| injected | 0.31 |
| licensed in the united … | 0.25 |