unimmunized

adjective

un·​im·​mu·​nized ˌən-ˈi-myə-ˌnīzd 

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

Again, the variant poses the biggest threat for the unimmunized. — Justin Ray, Los Angeles Times, 28 June 2021

Wendy Hasson, a pediatric intensive care physician in Oregon, knows the tragedy that can befall an unimmunized child. — Donna St. George, Anchorage Daily News, 27 Aug. 2022

In even rarer instances, the live virus can mutate into a form capable of starting new outbreaks among unimmunized people where vaccination rates are low. — CNN Money, 5 Aug. 2025

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

Humble, while stressing that data is still emerging, says omicron is proving highly contagious, much more than delta, particularly for those unimmunized and previously infected with COVID-19. — Gabe Lacques, USA TODAY, 15 Dec. 2021

Word History

First Known Use

1894, in the meaning defined above

Rhymes for unimmunized

• americanized
• anathematized
• collateralized
• contextualized
• conventionalized
• demilitarized
• demineralized
• departmentalized
• depersonalized
• industrialised
• industrialized
• materialised

Medical Definition

unimmunized

adjective

un·​im·​mu·​nized

variants or chiefly British unimmunised

(ˈ)ən-ˈim-yə-ˌnīzd 

: not immunized

unimmunized children