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INFORMATION ON : HH BLOOOD GROUP ( BOMBAY BLOOD GROUP) CREATED BY : NILAY N. PARLIKAR.

We are aware that there are main four types of Blood Groups : GROUP - A GROUP - B GROUP - AB GROUP - O All four groups with +, − denoting RhD status. But there is one exception to this above , the rare, hh blood group . This blood group was first discovered in Mumbai (then Bombay) in India in 1952 by Dr. Y. M. Bhende and this is called as Bombay Blood Group ..

What Makes it Different than Other Groups : Each red blood cell has antigen over its surface, which helps determine which group it belongs to. 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 . The same is explained in below chat :.

Rare in India, rarer globally : Globally , the hh blood type has an incidence of one in four million. It has a higher incidence in South Asia; in India, one in 7,600 to 10,000 are born with this type . Testing for the group : To test for hh blood, an Antigen H blood test is required. Often the hh blood group is confused with the O group. The difference is that the O group has Antigen H, while the hh group does not . If anyone lacks Antigen H, it does not mean he or she suffers from poor immunity or may be more prone to diseases. Their counts for haemoglobin , platelets, white blood cells and red blood cells are similar to the count of others based on their health index. Because of rarity, however, they do face problems during blood transfusion . They cannot receive blood from A, B, AB or O blood group. In contrast, hh blood group can donate their blood to ABO blood types..

Donating blood is a noble cause and a selfless act which helps save lives. Giving your blood to someone in need is a gift. No matter what blood type you have someone will need it . Thank you.