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 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 Most cases so far, Heaton said, are among unvaccinated school-age children. Erika Edwards, NBC news, 22 Oct. 2025 In practice, that would mean schools couldn’t send unvaccinated kids home, even during a measles outbreak, and private businesses and daycares couldn’t require people on their property to follow public health guidance. Audrey Dutton, ProPublica, 20 Oct. 2025 And unvaccinated children are up to 20 times more likely to develop long Covid. Eli Cahan, Rolling Stone, 16 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

Browse Nearby Words

Cite this Entry

“Unvaccinated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unvaccinated. Accessed 29 Oct. 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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!