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Type A

This blood type has the A antigen.

 


Type AB

This blood type has both A and B antigens.

 

Type O

This blood type has neither A nor B antigens. This blood type is known as a "universal donor."

Type B

This blood type has the B antigen.

 

Rh Factor

If the blood has a specific protein it is Rh+
If the blood does not have specific protein it is Rh-

 

A+

 

A-

 

B+

 

B-

 

O-

 

AB+

 

AB-

 

O+

 

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