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People who belong to an aristocratic family are said to have blue blood. This was probably due to the fact that aristocrats often had a very pale complexion (they did not spend much time in the sun and fresh air), and veins of a blue or bluish shade could easily be seen on their skin. Blue blood is of course just a phrase, as in the case of golden blood, which is the rarest blood type in the world. Only 43 people in the world can boast of it.
The rarest blood group
In 1901, the existence of blood groups was discovered: A, B, AB, 0, each of which has a negative or positive Rh factor. Until recently, scientists and doctors believed that the rarest blood type is AB Rh-. This was the case until 1961, when an even rarer group was identified in an Australian Aboriginal woman. She has Rh factor zero (Rhesus null – neither positive nor negative) and it can be inherited from parents (provided that the child receives a mutation in the RHCE gene from both the mother and father). Rh group zero does not have any of the 61 Rh antigens.
There are downsides to having gold blood
However, having such a rare blood type comes with serious risks. In the event of an illness or accident, when a blood transfusion is needed, there may be a problem with obtaining this rare blood type. On the other hand, a person who has Rh zero blood can be a donor for any other group.
If you are considering becoming an honorary blood donor, all information can be found at: .
Source: Gazeta
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