| Similarity | Rank | |
|---|---|---|
| pandemics | 0.910 | 81261 |
| H1N1 | 0.844 | 28204 |
| epidemic | 0.843 | 11823 |
| influenza | 0.840 | 17313 |
| epidemics | 0.831 | 38845 |
| outbreak | 0.780 | 11607 |
| bioterrorism | 0.780 | 81986 |
| SARS | 0.777 | 46429 |
| dengue | 0.775 | 44634 |
| measles | 0.768 | 31884 |
| flu | 0.763 | 7168 |
| outbreaks | 0.761 | 18613 |
| Influenza | 0.761 | 47326 |
| cholera | 0.761 | 32882 |
| Ebola | 0.757 | 80746 |
| malaria | 0.754 | 14990 |
| drug-resistant | 0.749 | 67927 |
| rotavirus | 0.748 | 82713 |
| smallpox | 0.737 | 39417 |
| communicable | 0.737 | 53049 |
| vaccine | 0.736 | 8077 |
| meningococcal | 0.729 | 89555 |
| Pandemic | 0.727 | 69823 |
| pertussis | 0.720 | 61015 |
| meningitis | 0.718 | 30455 |