unvaccinated

adjective

un·​vac·​ci·​nat·​ed ˌən-ˈvak-sə-ˌnā-təd 

: not having received a vaccine : not vaccinated

children unvaccinated for measles

Examples of unvaccinated in a Sentence

Recent Examples on the Web

But in many areas, that safety net has worn thin as shifting states laws grant more personal belief exemptions that allow unvaccinated children to attend school. — Brenda Goodman, CNN Money, 28 Aug. 2026

Most cases — 94% — have occurred in unvaccinated people or people whose vaccination status wasn't known, while another 3% happened in people who had received one dose of the measles, mumps and rubella vaccine. — Finch Walker, USA Today, 27 Aug. 2026

That was the case during an outbreak in Texas last year, when two unvaccinated girls died of the disease. — Erika Edwards, NBC news, 26 Aug. 2026

Just yesterday, officials in Pennsylvania reported that two unvaccinated people had died of the disease. — Dhruv Khullar, New Yorker, 26 Aug. 2026

Word History

First Known Use

1871, in the meaning defined above

Rhymes for unvaccinated

• vaccinated

Medical Definition

unvaccinated

adjective

un·​vac·​ci·​nat·​ed -ˈvak-sə-ˌnāt-əd 

: not vaccinated

unvaccinated children