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English definition of “immunize”

immunize

verb [T] uk (UK usually immunise)   /ˈɪm.jʊ.naɪz/ us  
specialized medical to protect a person or animal against a disease by putting a substance into their body that makes them produce antibodies (= proteins in the blood that fight disease): Children are routinely immunized against polio.
(Definition of immunize from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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