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A member asked:
Is it possible that a blood type changes from rh- to rh+ without pregnancy? used to be a- but recent blood donation says i'm a+
A doctor has provided 1 answer
Weak Rh: About one person in 500 has a weak version of the Rh antigen that used to type as negative but now shows as positive. There's also such thing as a lab error. Phone the blood bank and ask for an explanation.
Answered 2/2/2015
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