| Similarity | Rank | |
|---|---|---|
| an_outbreak | 0.806 | 99315 |
| outbreak_of | 0.770 | 54409 |
| epidemic | 0.770 | 9792 |
| disease_outbreak | 0.743 | 90918 |
| an_outbreak_of | 0.733 | 92417 |
| pandemic | 0.727 | 26455 |
| influenza | 0.684 | 26018 |
| bird_flu | 0.672 | 79601 |
| human_case | 0.672 | 92399 |
| infection | 0.669 | 2757 |
| avian_influenza | 0.668 | 99042 |
| cholera | 0.659 | 27526 |
| the_Ebola_virus | 0.656 | 74773 |
| Ebola | 0.651 | 11439 |
| measles | 0.649 | 26034 |
| swine_flu | 0.645 | 73020 |
| an_epidemic | 0.635 | 82990 |
| salmonella | 0.633 | 79933 |
| H1N1 | 0.633 | 92062 |
| Salmonella | 0.629 | 55733 |
| the_outbreak_of | 0.622 | 34755 |
| hepatitis_A | 0.621 | 96413 |
| flu | 0.618 | 15100 |
| dengue_fever | 0.609 | 87089 |
| dengue | 0.607 | 47346 |