| Similarity | Rank | |
|---|---|---|
| epidemic | 0.804 | 9792 |
| outbreak | 0.727 | 10943 |
| H1N1 | 0.686 | 92062 |
| influenza | 0.685 | 26018 |
| Ebola | 0.670 | 11439 |
| the_Ebola_virus | 0.669 | 74773 |
| disease_outbreak | 0.669 | 90918 |
| an_epidemic | 0.667 | 82990 |
| infectious_disease | 0.662 | 13558 |
| swine_flu | 0.648 | 73020 |
| communicable_disease | 0.635 | 59999 |
| an_outbreak | 0.624 | 99315 |
| SARS | 0.620 | 52517 |
| bird_flu | 0.620 | 79601 |
| outbreak_of | 0.619 | 54409 |
| avian_influenza | 0.615 | 99042 |
| natural_disaster | 0.614 | 11355 |
| cholera | 0.605 | 27526 |
| smallpox | 0.601 | 53441 |
| measles | 0.600 | 26034 |
| flu | 0.596 | 15100 |
| influenza_virus | 0.592 | 75849 |
| HIV_/_AIDS | 0.586 | 9611 |
| HIV | 0.581 | 4113 |
| plague | 0.578 | 9635 |