personality positive negative

Why Is it Important to Know Your Blood Type?

blood type test. Testing has become so easy these days that you can order the test online and go to a nearby walk-in lab to have the test taken.

Often, the test is performed the same day it is ordered.There are four main categories of blood type, including:In addition to the four categories of blood, a Rhesus-negative (Rh) antigen factor must also be considered.

If your blood contains this Rh antigen, it is Rh-positive. If no Rh antigen is found in your blood, you are Rh-negative. The Rh negative blood type can be administered to a person who has either the negative or positive Rh type of blood.

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