Classification System Blood Rh protein that is coated on the surface of red blood cells, which are called good protein (Antigen-D) as an indication. Rh blood group system is divided into two categories : 1. Blood Rh positive (Rh positive) is a blood-containing protein (Antigen-D) on the surface of red blood cells. In Thailand, people have Rh-positive blood type Rh-positive blood, about 99.7%, which we referred to simply as "Blood Simple" 2. Rh negative blood group (Rh negative) is the blood that does not contain protein (Antigen-D) on the surface of red blood cells. In Thailand found that blood is only 0.3%, or 1,000 people, which we found only three people simply referred to as "blood rare" or "special blood" (Rh negative) itself.
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