Blood types are determined by antigens -- a substance that triggers an immune response -- on the surface of red blood cells. There are ABO antigens, which designate ABO blood types. This is ...

Macy Meyer is a North Carolina native who graduated from UNC-Chapel Hill with a BA in English and a second BA in Journalism. Macy is a Writer on the CNET How-To team, covering a variety of topics ...

ABO group antigens are present on platelets, but RhD antigens are not expressed. Recent developments in platelet apheresis and blood-component-processing technology have led to a contamination of ...