Each blood type can be split up into two different types of its own, negative or positive. When you have positive blood, you have the antigen of RH present inside your plasma. Negative is the lack of the RH antigen. Although transfusions between different blood types can be fatal, the transfusion between the same blood type but a positive and negative RH is harmless.
A+: Blood type A+ is the second most common type of blood in the world. It can receive blood from O-, O+, A-, and A+. It can donate blood to A+ and AB+.
A-: Blood type A- is the sixth most common blood type in the world. It can receive blood from O- and A-. It can donate blood to A-, A+, AB-, and AB+.
B+: Blood type B+ is the third most common blood type in the world. It can receive blood from O-, O+, B-, and B+. It can donate blood to B+ and AB+.
B-: Blood type B- is the seventh most common blood type in the world. It can receive blood from O- and B-. It can donate blood to B-, B+, AB-, and AB+.
AB+: Blood type AB+ is the fourth most common blood type in the world. It can receive blood from AB+, AB-, O+, O-, A+, A-, B+, and B-. However, it cannot donate blood to anyone but AB+.
AB-: Blood type AB- is the eighth and least common blood type in the world. It can receive blood from O-, A-, B-, and AB-. It can donate blood to AB- and AB+.
O+: Blood type O+ is the most common blood type in the world. It can receive blood from O- and O+. It can donate blood to O+, A+, B+, and AB+.
O-: Blood type O- is the fifth most common blood type in the world. It can receive blood from only O-. However, it can donate blood to all blood types, AB+, AB-, O+, O-, A+, A-, B+, and B-.
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