The Warsaw Treaty Organization (also known as the Warsaw Pact) was a political and military alliance established on May 14, 1955 between the Soviet Union and several Eastern European countries.
1 Donors with blood type A... can donate to recipients with blood types A and AB. 2  Donors with blood type B... can donate to recipients with blood types B and AB.  Donors with blood type AB...
Confidence votes 210. Type O blood can donate to every kind of blood out there, but can only receive blood from other type O blood. Type AB blood can receive blood from every kind of blood out there, but can only donate to other type AB blood.