Blood types and transfusions:

Blood type compatibilities

-AB is the universal blood type receiver, but can only donate to AB.
-A can receive blood type from A or O and can donate to A or AB.
-B can receive blood type from B or O and can donate to B or AB.
-O can only receive from blood type O and is the universal blood type donor.
-Individuals with type O RH D negative blood type are often called universal donors, and those with type AB RH D positive are called universal recipients.

Plasma compatibility

-AB can only receive plasma from AB and is the universal plasma donor to any blood group.
-A can receive from A and AB, but can only donate to A and O.
-B can receive from B and AB, but can only donate to B and O.
-O is the universal plasma receiver, but can only donate plasma to O.
-Type O plasma containing both anti-A and anti-B antibodies can only be given to O recipients. Conversely, AB plasma can be given to patients of any ABO blood group, due to not containing any anti-A or anti-B antibodies.