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...
**Answer from another person** Type A blood can go to either another type A or type AB. Type B blood can go to either another type B or type AB. Type O can go to any blood type - O, A, B or AB hence it is known as the universal donor. While AB is the universal recipient - can receive any other type blood.