An illustration of red blood cells in the human body.

Blood Type Fun Facts

Do you know which blood group type you fall into? There are four categories of blood groups – A, B, AB, and O. Each blood group type has its own characteristics.

Learn more about the blood groups in the fun facts section.

Blood Type Fun Facts

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Blood Type

Karl Landsteiner, an Austrian physicist, discovered the Rh factor in 1935 when working with Alexander S. Wiener. The full form of the Rh factor is the “Rhesus Factor.”

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Blood Type

Karl Landsteiner, an Austrian physicist, is credited with discovering the blood types in 1900 when he was working at the University of Vienna.

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Blood Type

People having the blood group can donate to only a person having the same blood group, i.e. AB. However, they can receive blood from other people with blood group types.

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O +ve is the most commonly occurring blood group, with over 37% of the population having this blood group.

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Blood Type

There are four known types of blood groups, namely A, B, O, and AB. The presence or absence of the Rh factor in the blood further divides each of these into +ve and –ve.

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A +ve sign against our blood group type indicated the presence of Rh antigen in our blood. A –ve sign against the blood group type indicates its absence.

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AB –ve is the rarest form of blood group, with less than 1% population having this blood type. Despite this, there is not much demand for this blood group in hospitals.

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Blood Type

Rh antigens are certain proteins that are present in our red blood cells. Their presence or absence in our body is referred to Rh factor.

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People with AB+ blood groups are regarded as universal recipients. This means that they can receive blood from any of the four blood groups.

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People having O -ve blood groups are considered universal blood donors. This means that any blood types the O –ve blood can be used for transfusions.