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What are the main blood groups?

There are four main blood groups, A, B, AB, and O.

Each blood group has its own features and elements which set it apart.O group is universal blood and can be given to any patient. However, A, B, AB, and differ, mainly in terms of their types of antibodies and antigens.

The NHS describes antibodies as “proteins found in plasma. They recognise foreign substances, such as germs, and alert your immune system, which destroys them”.

Meanwhile, antigens are molecules found on the surface of red blood cells.


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