|ABO blood group||medical dictionary| According to the type of
antigen present, a person may be assigned a blood type of A, B,
AB or O. A second type of antigen, the Rh factor, renders a
positive or negative blood type. The ABO blood group system is
important because it determines who can donate blood to or
accept blood from whom. (04 Jul 1999) |Bookmark with:||word
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