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

He was fined $14,650 for the protocol violation and missed a game because unvaccinated players were required to isolate for 10 days after testing positive. — Los Angeles Times, 5 Aug. 2026

Another study published by the CDC in March 2022 showed that unvaccinated adults were 12 times more likely to be hospitalized than those who had received an initial series and booster dose of Covid-19 vaccine. — Deidre McPhillips, CNN Money, 4 Aug. 2026

Of measles cases so far in 2026 and for the entirety of last year, 93% have been among unvaccinated children, 3% were among children who received just one vaccine dose, and 4% were among kids who received both. — Jeffrey Kluger, Time, 27 July 2026

The majority, 93%, occurred in unvaccinated people, and nearly 69% occurred in children ages 19 and younger. — Mary Walrath-Holdridge, USA Today, 24 July 2026

Word History

First Known Use

1871, in the meaning defined above

Rhymes for unvaccinated

• vaccinated

Medical Definition

unvaccinated

adjective

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

: not vaccinated

unvaccinated children