 - DONOR: Must not be seropositive for HIV 1 and 2, hepatitis B surface antigen, hepatitis C antibody, human T-lymphotropic virus HTLV antibody, cytomegalovirus CMV immunoglobulin M IgM, or rapid plasma reagin RPR Treponema; donors with prior evidence of hepatitis B core antibody positivity will have a polymerase chain reaction PCR test done to evaluate for hepatitis B infection; donors with a positive hepatitis B PCR test are excluded 