Objective To operation patients before blood transfusion or four infective indexes detection,let patients before transfusion to know whether they are infected with the four infectious diseases,but also for the transfusion of blood or infection after the operation of several disease with authoritative basis,reduce unnecessary disputes.Methods Of collecting blood infectious disease four cases were detected.Results In 4154 patients,four of infectivity index and total positive rate was 12.87%,including hepatiti...