Type O blood is the Universal Donor so persons with Type A, B, AB and O can receive blood from an O donor depending upon presence of antigens.
Type AB is the universal recipient of all blood types depending on the antigens of course.
All types A, B, AB, and O.
Type A blood can only be donated to others with Type A blood or AB blood.
A person with A negative blood can donate blood to a person with A negative blood and a person with AB negative blood.
B and O
If the blood types do not match, you run the risk of toxicity.
Generally the only time blood type compatability is important is during a blood transfusion. At this time it is essential that the recipient be given a blood type they are compatible with to avoid a fatal reaction. A person with AB blood can receive blood for anyone. A person with A blood can only receive blood from someone who has either A or O blood. Similarly a type B person can receive only from type B or O. A type O person can donate to any bloodtype, but can only receive from another type O person.
People with A Positive blood can only donate to people with blood types A or AB, not any other. You can donate to people outside your blood type group, though only to AB People.
A person with type O blood can only get a transfusion using type O blood. Someone with type A or B blood, however, can get a transfusion with their own type blood or with type O blood, which is known as a universal blood type.
O- blood used to be considered the universal blood donor but now medicine knows that there are other factors in the blood that can cause rejection from the body.http://www.mayoclinic.org/tests-procedures/blood-transfusion/expert-answers/universal-blood-donor-type/faq-20058229
The blood given by transfusion must be matched with the recipient's blood type. Incompatible blood types can cause a serious adverse reaction (transfusion reaction). Blood is introduced slowly by gravity flow directly into the veins
that the blood types are the same or compatible
As long as the blood types match, anyone can donate to anybody.
Blood types are not dependent on race so if their blood types are the same when they are tested it would be fine.