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A member asked:
Both my son and i share the same blood type, a rhesus negative. is all a rhesus negative blood the same or are there different sub-groups?
4 doctors weighed in across 2 answers
Other sub-groups: There are other sub-groups. This is why someone is always tested again if they need a blood transfusion, because it must match for all those groups, not just the a, b, o and rh factor.
Answered 12/16/2013
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Yes but: Minor blood antigens are present but insignificant unless you are being screened as a bone marrow donor.
Answered 9/18/2015
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