| Similarity | Rank | |
|---|---|---|
| outbreak | 0.743 | 10943 |
| an_outbreak | 0.700 | 99315 |
| epidemic | 0.687 | 9792 |
| avian_influenza | 0.671 | 99042 |
| outbreak_of | 0.670 | 54409 |
| pandemic | 0.669 | 26455 |
| infectious_disease | 0.666 | 13558 |
| communicable_disease | 0.652 | 59999 |
| bird_flu | 0.647 | 79601 |
| pathogen | 0.647 | 11287 |
| an_outbreak_of | 0.625 | 92417 |
| disease | 0.611 | 971 |
| dengue_fever | 0.608 | 87089 |
| food_shortage | 0.604 | 55387 |
| extreme_weather_event | 0.603 | 54119 |
| influenza | 0.603 | 26018 |
| dengue | 0.599 | 47346 |
| cholera | 0.591 | 27526 |
| swine_flu | 0.589 | 73020 |
| disease_control | 0.589 | 76245 |
| natural_disaster | 0.588 | 11355 |
| salmonella | 0.585 | 79933 |
| the_Ebola_virus | 0.585 | 74773 |
| human_case | 0.579 | 92399 |
| Ebola | 0.579 | 11439 |