- DONOR: Any cord blood units without the full maternal testing and negative results for hepatitis A, B, C, HIV, and human T-lymphotropic virus (HTLV-1) viruses; any additional available virology results on the unit itself will be reviewed but are not mandated, complete or always available; cord blood units are presumed to be cytomegalovirus (CMV) negative regardless of serologic testing due to passive transmission of maternal CMV antibodies