| Because of the herd immunity that exists because of mass vaccination, the unvaccinated are also protected. |
| Using a vaccine fully active in others, I vaccinated the exposed unvaccinated nurses. |
| Chickenpox was significantly more severe in unvaccinated children than in vaccinated children. |
| This study provides the only available results comparing the clinical course of pertussis in vaccinated and unvaccinated children. |
| Of five unvaccinated dogs, all succumbed to inoculation, by trepanning, of the brain. |
| All previously unvaccinated household and sexual contacts of persons with serologically confirmed hepatitis A should receive immune globulin. |
