You probably don't give your blood type much thought unless you've just donated.
There are eight different kinds of blood, and they are classified by the presence or lack of molecules termed A or B antigens.
There are eight different blood types, as noted by the American Red Cross.
A+, A-, B+, B-, AB+, AB-, O+, and O-.
According to a 2013 paper published in Blood Transfusion, however, these antigens affect more than simply your blood.
Your blood type may be related to your susceptibility to certain illnesses because of the way your blood cells.