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About Blood Types

There are four blood groups: O, A, B and AB. How is blood type determined? It’s based on antigens and antibodies. An antigen is a protein that is present on your red blood cells. A antigens on red blood cells denote blood group A. B antigens on red blood cells denote blood group B. A and B antigens on red blood cells denote blood group AB. Neither A nor B antigens on red blood cells denote Group O.

The “Rh” factor determines whether your blood is “positive” or “negative”; the “D” antigen on red blood cells denotes Rh Positive blood and the absence of the “D” antigen denotes Rh Negative blood. 85% of Canadians are Rh Positive and 15% are Rh Negative

The combination of your blood group and Rh factor
gives your full blood type.

Blood Type Facts

World Map of Blood Types

% of Blood Types in Canada

About Blood Types
Blood Type Facts
World Map of ABO Blood Types
Percentage of Blood Types In Canada

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