Golden Blood : The rarest blood

We all know people who have variations of blood types A, B and O. But have you ever come across someone who has golden blood? Most likely not. Because only 43 people in the world have been discovered with this blood type in the last 56 years, making it the rarest of all
What is golden blood?
The surface of blood cells is coated with up to 342 antigens whose combination determines a person's blood type.

In 1961, a new type, that lacked all 61 antigens in the Rh system, was discovered. It was named Rh-null. 43 people have had it, but currently there are only nine active donors, making it the world's most precious blood type.

Making Rh-null blood donations is not easy
People with Rh-null blood can be universal donors but because of its rarity, it can get extremely difficult for them, should they need it.

The Bombay blood type is one of the rarest too
Though not as precious as golden blood, the Bombay blood type is also considered one of the rarest.

Found in less than 0.0004% of the world population, it was discovered in Mumbai in 1952. The presence of antigen H makes it different.

People with it can receive blood only from their own group but can donate to blood types within the ABO phenotype realm.