Blood Group & Rh Type
There are four major blood groups, A, B, AB and O. These major blood groups can be either Rhesus (Rh) negative or positive. It is important to know your blood group prior to a blood transfusion. With very few exceptions, an individual must always be transfused with his or her own blood type and Rh.

Rapid Plasma Reagin (RPR)
RPR is a very sensitive test used to screen for syphilis. A positive (detected) result does not necessarily indicate that a person has syphilis. Because the test is set to detect abnormals at very low levels, there is some chance of a false-positive result. However, a physician should follow up all positive results.