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...
You can donate to people with A+, B+, AB+ or O+. You only get blood from someone that is O+ though. People with positive blood cannot donate to people with negative blood and vice versa.ike An O+ donor can give to A+, B+, or AB+, as long as the type, screen, and crossmatch is compatible. If in EXTREME emergencies, you can give O-blood to anyone, but ONLY O-because it lacks any red blood cell surface antigen,and therefore won't cause a hemolytic transfusion reaction. O-people are universal donors.