1. Use of serological tests to reduce the risk of transfusion-transmitted human T-lymphotropic virus types I and II (HTLV-I/II) Publication: Silver Spring, MD : Center for Biologics Evaluation and Research, February 2020 Subject(s): Blood Transfusion -- standardsHTLV-I Antibodies -- bloodHTLV-II Antibodies -- bloodHTLV-I Infections -- transmissionHTLV-II Infections -- transmissionUnited StatesUnited States. Department of Health and Human Services.United States. Food and Drug Administration.