Bloodgroups 101 Blood of type A can be administered to type A and AB patients. Type B can be administered to type B and type AB. Type AB can only be administered to type AB patients. Type 0 can be administered to all patients. A patient with type AB blood can receive any type of blood. A patient with type 0 can receive type 0 blood only. A person with type 0 is said to be a universal donor. A person with type AB is said to be a universal receiver. Blood should be Rh negative if the Rh status of the patient is unknown. Normally the Rh status of given blood should match that of the patient. A secretor's blood group can be determined from their saliva and other bodily secretions. This can be of use in investigations against that person. Determining bloodgroup 00-04 AB 05-14 B 15-59 A 60-99 0 00-84 Rh positive 85-99 Rh negative 00-24 Secretor 25-99 Non-secretor Document bloodgroup as . Also document secretor status. Examples: AB+ 0- (secretor) A-