some people may consider bambay bl gr to be a subtype of O-...........they are right in their logic as the abo system is based on A & B antigens only and not the h antigen
The important distinction comes in blood transfusion
O- pts do not have anti h antibodies in their blood while bombay bl gr does
so bombay pts can be transfused only with bombay blood..........but they can donate blood to O- pts
(during transfusion cross matching between donors cells and recipients plasma)
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