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.
The immune response is strong at younger ages, and there has not been evidence of significant waning protection. Katia Hetter, CNN Money, 24 Apr. 2026 In both groups, mCOMBRIAX spurred statistically-significant higher immune responses against common flu strains (A/H1N1, A/H3N2, and B/Victoria) and against SARS-CoV-2 than the comparator vaccines. Beth Mole, ArsTechnica, 24 Apr. 2026 Epigenetic changes, such as methylation of genes involved in the immune response, were also documented. Scott E. Solomon, STAT, 22 Apr. 2026 These monthly injections help regulate immune responses and moderate allergy attacks. Mark Gurarie, Verywell Health, 22 Apr. 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 1 May. 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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