| Similarity | Rank | |
|---|---|---|
| Flu | 0.895 | 27354 |
| Influenza | 0.825 | 47326 |
| Avian | 0.819 | 58666 |
| swine | 0.797 | 20853 |
| Vaccine | 0.791 | 39825 |
| Vaccines | 0.791 | 50790 |
| H1N1 | 0.788 | 28204 |
| Outbreak | 0.780 | 78213 |
| Pandemic | 0.778 | 69823 |
| Measles | 0.771 | 93119 |
| Vaccination | 0.768 | 59890 |
| Rabies | 0.764 | 68756 |
| Epidemic | 0.751 | 67773 |
| flu | 0.749 | 7168 |
| Vaccinations | 0.740 | 79444 |
| Meningitis | 0.735 | 86325 |
| Poisoning | 0.735 | 70358 |
| Infection | 0.728 | 18268 |
| Infections | 0.725 | 32849 |
| Allergies | 0.718 | 40090 |
| Ebola | 0.717 | 80746 |
| influenza | 0.716 | 17313 |
| Illnesses | 0.705 | 87687 |
| salmonella | 0.705 | 40541 |
| Bovine | 0.703 | 86610 |