People with blood type AB are considered universal recipients.
People with blood type O are considered universal donors.
Definition: An antigen is a substance that stimulates the production of antibodies when introduced into the body. Antigens include toxins, bacteria, viruses and other foreign. The carbohydrates found on the red blood cells, A and B blood types are antigens.
The Rh blood grouping is also an antigen. However, this antigen is made of protein.
Antibody: any of numerous proteins produced by white blood cells in response to the presence of specific foreign antigens. Antibodies attach to antigens and deactivate them.
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