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.
The Directorate General of Health Services said unvaccinated children or those who have not completed ​the two-dose measles schedule face the greatest risk ​and ⁠that malnourished children are particularly prone to severe complications such as pneumonia and encephalitis. Reuters, NBC news, 2 Apr. 2026 Measles is one of the most contagious diseases, spreading easily through air droplets, liable to infect up to 90% of unvaccinated people nearby. Katie Silver, NPR, 28 Mar. 2026 About one in five unvaccinated people who get measles are hospitalized, according to the health department. Natalie Davies, Freep.com, 21 Mar. 2026 The unvaccinated Russian boy offered a clue to the rest. Patricia Callahan, ProPublica, 19 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 5 Apr. 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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