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...
Type Oâ blood is considered the âuniversal donorâ because it can be donated to people of any blood type. Type AB+ blood is considered the âuniversal recipientâ because people with this type can receive any blood type.ype Oâ blood is considered the âuniversal donorâ because it can be donated to people of any blood type. Type AB+ blood is considered the âuniversal recipientâ because people with this type can receive any blood type.