Question

Why is it important for a person to receive a blood type and Rh factor that is compatible with his or her own blood?

Answer 1

While there are more than 20 blood-type systems, ABO and Rh are the most important ones. The importance of knowing your blood type is to prevent the risk of you receiving an incompatible blood type at a time of need, such as during a blood transfusion or during surgery.

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Answer 2

Hey!

Here's why its important:-

When a foreign antigen reaches one’s blood, it stimulates the defense mechanism. On receiving unmatching blood, the antigen present in the donor's blood and the antibody present in the recipient's blood will react with each other and form a blood clot. Hence, everyone cannot receive blood from all blood groups.