unvaccinated

adjective

un·​vac·​ci·​nat·​ed ˌən-ˈvak-sə-ˌnā-təd How to pronounce unvaccinated (audio)
: not having received a vaccine : not vaccinated
children unvaccinated for measles

Examples of unvaccinated in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Colorado has confirmed eight measles cases so far in 2026, all among unvaccinated people. Meg Wingerter, Denver Post, 6 Mar. 2026 The new case marks the third case among three unvaccinated people, two of whom are confirmed to be students at the school, according to the Colorado Department of Public Health and Environment. Austen Erblat, CBS News, 5 Mar. 2026 His death, and the deaths of many others who were convinced to remain unvaccinated, might be as much owing to the narratives they were told as to the virus itself. Tim Brinkhof, Big Think, 3 Mar. 2026 In 2025, 93% of measles cases occurred in unvaccinated individuals, and 44% occurred in youth aged 5-19. Eleanor Nash, Kansas City Star, 3 Mar. 2026 See All Example Sentences for unvaccinated

Word History

First Known Use

1871, in the meaning defined above

Time Traveler
The first known use of unvaccinated was in 1871

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Cite this Entry

“Unvaccinated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unvaccinated. Accessed 9 Mar. 2026.

Medical Definition

unvaccinated

adjective
un·​vac·​ci·​nat·​ed -ˈvak-sə-ˌnāt-əd How to pronounce unvaccinated (audio)
: not vaccinated
unvaccinated children
Last Updated: - Updated example sentences
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