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Immunity acquired by the transfer of antibodies from another individual, as through injection or placental transfer to a fetus.
passive immunization n.
immunity that results from an external source, as injected antibody, or in infants from maternal antibody passed through the placenta or received from breast milk.
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|Noun||1.||passive immunity - an impermanent form of acquired immunity in which antibodies against a disease are acquired naturally (as through the placenta to an unborn child) or artificially (as by injection of antiserum)|
acquired immunity - immunity to a particular disease that is not innate but has been acquired during life; immunity can be acquired by the development of antibodies after an attack of an infectious disease or by a pregnant mother passing antibodies through the placenta to a fetus or by vaccination