Central Blood Bank

There are four different blood groups: A, B, AB and O.

Your blood type is determined by the presence of antibodies and antigens in your blood.

ANTIBODY: Protein that fights infection
ANTIGEN: Substance that stimulates the production of an antibody


Type A

Type B

Type A Graphic Type B Graphic


Type AB

 Type O

Type AB Graphic Type O Graphic

What about Positive and Negative?


Rh Positive

Rh Positive Graphic


Rh Negative

Rh Negative Graphic


Percentages of the U.S. Population with Each Blood Type:

Blood Types Percentages_Graphic

How do we type your blood?