un·​vac·​ci·​nat·​ed | \ˌən-ˈvak-sə-ˌnā-təd \

Definition of unvaccinated 

: not having received a vaccine : not vaccinated children unvaccinated for measles

Examples of unvaccinated in a Sentence

Recent Examples on the Web

This means a few unvaccinated people living in close proximity can be dangerous. Julia Belluz, Vox, "New York’s Orthodox Jewish community is battling measles outbreaks. Vaccine deniers are to blame.," 9 Nov. 2018 But even after story after story surfaced where a previously healthy but unvaccinated child or adult had died, misinformation continues to circulate about this potentially life-saving immunization. Caroline Picard, Good Housekeeping, "No, The Flu Shot Won't Give You the Flu — But Here’s Why You Might Feel Sick Afterwards," 19 Oct. 2018 Of 26 raccoons found dead inside the park since June 24, two tested positive for the canine distemper virus, which doesn’t affect humans but can spread to unvaccinated dogs, officials with the city Health and Parks departments revealed on Saturday. Fox News, "Dozens of raccoons die from viral 'zombie' outbreak in New York's Central Park," 22 July 2018 In the Berkeley Rose School, a private Waldorf school, all of the unvaccinated students (87 percent of the kindergartners) had personal belief exemptions. New York Times, "After a Debacle, How California Became a Role Model on Measles," 16 Jan. 2018 Mignot, too, believes there was a true rise in narcolepsy cases during the pandemic, both among vaccinated and unvaccinated people. Helen Branswell, STAT, "A stubborn medical mystery: Was pandemic flu vaccine tied to an increase in narcolepsy cases?," 5 July 2018 At least 80-85% must be fully immunised to ensure that polio cannot spread among unvaccinated individuals if it is ever reintroduced. The Economist, "Polio has been reported in Papua New Guinea," 28 June 2018 Then the Missouri outbreak started and spread in and around Liberty, mostly among a few unvaccinated families. Andy Marso, kansascity, "Kansas City's two measles outbreaks are over. But what did they cost taxpayers?," 11 June 2018 But since then there have been instances of record-breaking outbreaks, mostly among unvaccinated individuals and groups that shun vaccination. Naseem S. Miller, OrlandoSentinel.com, "4 measles cases reported in Florida this month," 29 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unvaccinated.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of unvaccinated

1871, in the meaning defined above

Keep scrolling for more

Learn More about unvaccinated

Share unvaccinated

Statistics for unvaccinated

Last Updated

14 Nov 2018

Look-up Popularity

Time Traveler for unvaccinated

The first known use of unvaccinated was in 1871

See more words from the same year

Keep scrolling for more

More Definitions for unvaccinated


un·​vac·​ci·​nat·​ed | \-ˈvak-sə-ˌnāt-əd \

Medical Definition of unvaccinated 

: not vaccinated unvaccinated children

Comments on unvaccinated

What made you want to look up unvaccinated? Please tell us where you read or heard it (including the quote, if possible).


playful or foolish behavior

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

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