► Bombay Blood Group - The Rarest ◄
Only a few hundred people in the world are known to have the rare blood type H-H or Bombay blood group. This blood phenotype was first discovered in Bombay, now known as Mumbai, in India, by Dr. Y.M. Bhende in 1952.
A person with H-H blood can’t receive blood transfusions of any other blood type (except from others with BBG) and may need to store their own blood in advance of an operation. It is present in about 0.0004% (about 4 per million) of the human population generally.