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2015-11-19T21:48:41+05:30

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The blood of most people contains a substance called Rh factor.(Rh stands for Rhesus,our common monkey,in which the factor as discovered.When the blood of such an individual(Rh positive)is transferred into persons lacking it Rh negative),the blood of the recipient develops an antibody for Rh substance(gets sensitized) within about two weeks of transfusion.
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