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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

    come into one's own
    to begin to perform or work well because of good circumstances
    The basketball player has come into his own since he changed positions.



    1.
    When the bus pulled out, I held ________ to the rail.

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    Invention : roller coaster
    Year : 1884
    Inventor : lemarcus a. thompson
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