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.
Mexico has also had thousands of measles cases this year, mostly among unvaccinated people. Kathryn H. Jacobsen, The Conversation, 10 Nov. 2025 In an unvaccinated population, each case can spawn between 12 and 18 new cases, says Amy Winter, an epidemiologist and biostatistician at the University of Georgia. Stephanie Pappas, Scientific American, 3 Nov. 2025 The outbreak saw 762 measles cases, 99 hospitalizations and two deaths, both of unvaccinated children. Kristen Taketa, San Diego Union-Tribune, 27 Oct. 2025 The measles outbreak along the state line between Arizona and Utah has grown to more than 100 cases since mid-August, spreading largely in unvaccinated communities. Deidre McPhillips, CNN Money, 27 Oct. 2025 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 19 Nov. 2025.

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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