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passive immunity

n.
1.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)

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    Idiom of the Day

    mark up (something) or mark (something) up
    to mess something up with marks
    The child marked up the new table that her parents had just bought.



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