Blood Type
Current as of: March 28, 2019
Author: Healthwise Staff
Medical Review:E. Gregory Thompson, MD – Internal Medicine & Adam Husney, MD – Family Medicine & Martin J. Gabica, MD – Family Medicine & Brian Leber, MDCM, FRCPC – Hematology
Human blood is typed according to whether certain markers, called antigens, are present on the surface of red blood cells. The ABO system classifies blood as type A, B, AB, or O based on the presence or absence of the A and B antigens; the Rh system classifies blood as negative or positive based on the presence or…