unvaccinated
adjective
un·vac·ci·nat·ed
ˌən-ˈvak-sə-ˌnā-təd 
: not having received a vaccine : not vaccinated
children unvaccinated for measles
Examples of unvaccinated in a Sentence
Recent Examples on the Web
This second case follows confirmation that an unvaccinated adult who had traveled abroad returned home to Connecticut two weeks ago and began to show symptoms of measles after returning.
—
Staff Report,
Hartford Courant,
29 June 2026
Researchers then checked whether the patients had been vaccinated, and used the information to calculate the odds of a positive test in the groups of unvaccinated and vaccinated individuals, respectively.
—
Rachel Raposas,
PEOPLE,
24 June 2026
Measles is one of the most contagious diseases known and can spread easily, especially among unvaccinated or undervaccinated populations.
—
Los Angeles Times,
19 June 2026
The virus is one of the most contagious infectious diseases; so contagious, in fact, that 90% of unvaccinated people who are exposed end up contracting it.
—
Mary Walrath-Holdridge,
USA Today,
8 June 2026
See All Example Sentences for unvaccinated
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Staff Report,
Hartford Courant,
29 June 2026
Researchers then checked whether the patients had been vaccinated, and used the information to calculate the odds of a positive test in the groups of unvaccinated and vaccinated individuals, respectively.
—
Rachel Raposas,
PEOPLE,
24 June 2026
Measles is one of the most contagious diseases known and can spread easily, especially among unvaccinated or undervaccinated populations.
—
Los Angeles Times,
19 June 2026
The virus is one of the most contagious infectious diseases; so contagious, in fact, that 90% of unvaccinated people who are exposed end up contracting it.
—
Mary Walrath-Holdridge,
USA Today,
8 June 2026
See All Example Sentences for unvaccinated
Cite this Entry
“Unvaccinated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unvaccinated. Accessed 5 Jul. 2026.
Copy CitationMedical Definition
unvaccinated
adjective
un·vac·ci·nat·ed
-ˈvak-sə-ˌnāt-əd
: not vaccinated
unvaccinated children
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