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.
Measles activity globally is also increasing, leading to higher potential for unvaccinated people to become infected while abroad. Angie Dimichele, Sun Sentinel, 1 May 2026 Most cases were among unvaccinated children under age 17, officials said. Mary Kekatos, ABC News, 1 May 2026 In unvaccinated pregnant women, measles may cause premature birth or a low-birthweight baby. Thao Nguyen, USA Today, 30 Apr. 2026 Also, limit your puppy or unvaccinated dog’s exposure to other dogs, The Animal Foundation advised. Don Sweeney, Sacbee.com, 28 Apr. 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 7 May. 2026.

Medical Definition

unvaccinated

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