. A blood type can be classified into four common groups known as the ABO system: A, B, AB, or O. A second system, the Rh system, determines if the blood type is Rh-positive or negative.
. The ABO type and an Rh test can be performed on whole blood for any age.
. Blood typing is a common test before blood transfusions, tissue transplants, and during pregnancy
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8:30 PM Sunday
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