variants or chiefly British unimmunised
: not made immune (as by vaccination) : not immunized
Because your child has been immunized, she faces no danger of playing with an unimmunized child. Paul G. Donohue

Examples of unimmunized 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.
Some unimmunized people have experienced early negativity, too, and many people who have gotten their shots still test positive before falling ill. SARS-CoV-2 traits, too, could be flipping the sickness script, which brings us to the virus hypothesis. Katherine J. Wu, The Atlantic, 10 June 2022 Almost one out of three health-care workers were not fully vaccinated against the coronavirus as of mid-September, according to a study published this week, suggesting millions of them could remain unimmunized by a January deadline set by the Biden administration. Washington Post, 19 Nov. 2021

Word History

First Known Use

1894, in the meaning defined above

Time Traveler
The first known use of unimmunized was in 1894

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Cite this Entry

“Unimmunized.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unimmunized. Accessed 23 Apr. 2025.

Medical Definition

unimmunized

adjective
un·​im·​mu·​nized
: not immunized
unimmunized children
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