immune response

noun

: a bodily response to an antigen that occurs when lymphocytes identify the antigenic molecule as foreign and induce the formation of antibodies and lymphocytes capable of reacting with it and rendering it harmless

called also immune reaction

Examples of immune response 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.
Brain imaging studies have also shown placebo responses can influence stress pathways, hormone activity, immune responses and chemicals tied to mood and pain regulation. Daryl Austin, USA Today, 18 June 2026 Instead, Moderna used the smaller trial to compare immune responses of mRNA-1010 to a high-dose vaccine—which was a plan the FDA had previously agreed would be acceptable. Beth Mole, ArsTechnica, 18 June 2026 The genomes also revealed a unique superantigen, or a microbial toxin that can increase an infection’s severity and activate extreme immune responses — one that appears to have predominantly affected children between the ages of 7 ½ and 11 years old. Ashley Strickland, CNN Money, 17 June 2026 Research has also found that women generally have stronger immune responses, thanks to hormonal and genetic factors. Helen Carefoot, Flow Space, 17 June 2026 See All Example Sentences for immune response

Word History

First Known Use

1923, in the meaning defined above

Time Traveler
The first known use of immune response was in 1923

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Cite this Entry

“Immune response.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/immune%20response. Accessed 20 Jun. 2026.

Kids Definition

immune response

noun
: a bodily response to a foreign substance, cell, or tissue that involves the formation of antibodies and cells capable of reacting with it and rendering it harmless

called also immune reaction

Medical Definition

immune response

noun
: a bodily response to an antigen that occurs when lymphocytes identify the antigenic molecule as foreign and induce the formation of antibodies and lymphocytes capable of reacting with it and rendering it harmless

called also immune reaction

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