Hh blood group


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Related to Hh blood group: H gene

Hh blood group

A blood group rare in Western populations, found most often in those of Taiwanese or Indian descent, and determined by a particular oligosaccharide on the surface of red blood cells. The absence of the H antigen, the determining oligosaccharide of this blood group, can result rarely in severe transfusion reactions when an H-deficient person receives blood from any ABO blood group donor.
See also: blood group