Immunophenotype of bivirus-specific CTL lines generated for clinical use. Reactivity of CTL lines (n = 20) with antibodies against the T-cell surface antigens CD3, CD4, CD8, and CD56, the monocyte surface antigen CD14, and the B-cell surface antigen CD19. Lines made from haploidentical donors are represented by circles (n = 8), and those made from matched unrelated donors are represented by triangles (n = 12).