What determines blood type? What type of blood antigens are expressed if a person is blood type AB-negative? Why doesn't a negative transfusion reaction occur the first time a Rh-positive patient is exposed to Rh-negative blood?
Added by Thomas H.
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There are two main antigens in the ABO blood group system - antigen A and antigen B. Blood type AB expresses both antigens A and B. Show more…
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