Rare blood type

A person can only give blood to someone with compatible blood antigens.

People with Rh- blood can give blood to both Rh- and Rh+ recipients.

However, those with Rh+ blood cannot give to Rh- recipients.

If a person receives blood from someone with an incompatible blood type, it can cause a life threatening immune system reaction. The blood transfusion will likely fail.

A person with type O blood can donate to anyone, as long as the Rh factor is compatible.

This means that people with O+ blood can donate to someone with A+, AB+, B+, or O+ blood, but not to people with O-, B-, AB-, or A- blood.

O- is a universal donor, which means that a person with this blood type can donate to anyone.

A person with type AB blood is a universal recipient, as long as the Rh factor is compatible.

This means that they can receive blood from all other blood groups.

People with group AB, A, or B blood can only donate to people with the same blood group type.

Of the eight main blood types, AB- is the least common, but the type of all is Rhnull, wh

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