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The red blood cells define the blood group you actually belong to. There are small markers known as antigens on the red cells surface, but they are so tiny that it cannot be viewed under a microscope. However, every person has different antigens but for identical twins. The antigens identify the blood types

and are the key to match the transfusions as well that helps in

avoiding serious complications. The blood group structure is defined as

the ABO system.

Another significant factor worth considering is the Rh system.

All the blood groups have the possibility of having Rh antigens.

Conversely, there are some who have it, while some do not have it. In

case, the blood group belongs to Rh antigens, then they are Rh positive

and a person having A blood group with Rh positive is recognized as A+.

In case a person has A blood group with Rh negative, then it is A-.

This is the same pattern followed for O, B or AB blood group as well.

The Rh system duals the blood groups effectively so that the positive

blood type does not get mixed with negative.

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There are four main blood types in Russia: A, B, AB, and O. These types are similar to the blood types 1, 2, 3, and 4 commonly used in other countries. The main difference lies in the specific antigens present on the red blood cells, which determine compatibility for blood transfusions.


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