| Similarity | Rank | |
|---|---|---|
| vaccine | 0.941 | 8077 |
| vaccinations | 0.866 | 22129 |
| vaccination | 0.861 | 15659 |
| rotavirus | 0.850 | 82713 |
| vaccinating | 0.840 | 79604 |
| pertussis | 0.821 | 61015 |
| influenza | 0.817 | 17313 |
| pneumococcal | 0.817 | 77954 |
| H1N1 | 0.811 | 28204 |
| immunization | 0.805 | 31040 |
| meningococcal | 0.804 | 89555 |
| measles | 0.803 | 31884 |
| immunizations | 0.803 | 42167 |
| Vaccines | 0.801 | 50790 |
| vaccinated | 0.801 | 25412 |
| Gardasil | 0.800 | 69039 |
| thimerosal | 0.798 | 91384 |
| vaccinate | 0.797 | 54917 |
| MMR | 0.794 | 49051 |
| Tamiflu | 0.789 | 58208 |
| tetanus | 0.787 | 48712 |
| rubella | 0.786 | 67849 |
| antibiotic-resistant | 0.784 | 89764 |
| antibiotics | 0.783 | 7476 |
| immunisation | 0.782 | 73736 |