Explained: What is Bombay blood group, rare and sought after?
https://indianexpress.com/article/explained/what-is-bombay-blood-group-rare-and-sought-after-5984653/
WebSep 11, 2019 · The Bombay blood group, also called hh, is deficient in expressing antigen H, meaning the RBC has no antigen H. For instance, in the AB blood group, both antigens A and B are found. A will have A antigens; B will have B antigens. In hh, there are no A or B antigens. Rare in India, rarer globally.
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