| Similarity | Rank | |
|---|---|---|
| vaccinate | 0.819 | 25748 |
| poliomyelitis | 0.817 | 48186 |
| cowpox | 0.815 | 85609 |
| rubella | 0.815 | 36198 |
| sexually-transmitted | 0.809 | 64953 |
| diphtheria | 0.807 | 24994 |
| hiv-infected | 0.806 | 36119 |
| zovirax | 0.789 | 83324 |
| immunisation | 0.786 | 21651 |
| seropositive | 0.785 | 40284 |
| smoking-related | 0.781 | 62406 |
| mumps | 0.778 | 58304 |
| pentamidine | 0.778 | 77976 |
| chlamydia | 0.777 | 41650 |
| retrovir | 0.776 | 74764 |
| aplastic | 0.773 | 99413 |
| brucellosis | 0.772 | 95620 |
| haemophiliac | 0.771 | 26237 |
| haemophilia | 0.771 | 34366 |
| toxoid | 0.771 | 89400 |
| opv | 0.770 | 33940 |
| ibuprofen | 0.768 | 96884 |
| symptom-free | 0.767 | 77535 |
| thromboembolic | 0.766 | 91147 |
| polio | 0.765 | 19165 |