| Similarity | Rank | |
|---|---|---|
| influenza | 0.921 | 17313 |
| flu | 0.884 | 7168 |
| Influenza | 0.870 | 47326 |
| vaccine | 0.864 | 8077 |
| pandemic | 0.844 | 22984 |
| pertussis | 0.844 | 61015 |
| measles | 0.831 | 31884 |
| H5N1 | 0.829 | 35572 |
| rotavirus | 0.826 | 82713 |
| meningococcal | 0.821 | 89555 |
| dengue | 0.814 | 44634 |
| Flu | 0.811 | 27354 |
| vaccines | 0.811 | 12666 |
| vaccination | 0.802 | 15659 |
| Tamiflu | 0.801 | 58208 |
| Measles | 0.801 | 93119 |
| norovirus | 0.792 | 89325 |
| Swine | 0.788 | 45975 |
| pneumococcal | 0.785 | 77954 |
| SARS | 0.780 | 46429 |
| meningitis | 0.779 | 30455 |
| swine | 0.778 | 20853 |
| mumps | 0.769 | 63582 |
| varicella | 0.768 | 92938 |
| MRSA | 0.767 | 27764 |