| Similarity | Rank | |
|---|---|---|
| Swine | 0.895 | 45975 |
| Influenza | 0.872 | 47326 |
| flu | 0.841 | 7168 |
| Measles | 0.833 | 93119 |
| Outbreak | 0.822 | 78213 |
| H1N1 | 0.811 | 28204 |
| Pandemic | 0.800 | 69823 |
| Vaccine | 0.793 | 39825 |
| Vaccination | 0.787 | 59890 |
| Avian | 0.783 | 58666 |
| Meningitis | 0.776 | 86325 |
| Rabies | 0.771 | 68756 |
| Vaccinations | 0.764 | 79444 |
| Vaccines | 0.763 | 50790 |
| Epidemic | 0.760 | 67773 |
| Infection | 0.759 | 18268 |
| influenza | 0.753 | 17313 |
| Infections | 0.751 | 32849 |
| Asthma | 0.747 | 28276 |
| Pneumonia | 0.739 | 74411 |
| Cough | 0.734 | 54392 |
| Dengue | 0.731 | 81476 |
| measles | 0.724 | 31884 |
| Polio | 0.720 | 70932 |
| Illnesses | 0.720 | 87687 |