Individual and median levels of antigenemia, viremia, and DNAemia in treated patients upon onset of first course and subsequent courses of antiviral treatment in the 2 randomization arms. Antigenemia (Ag; left y-axis) is expressed as the number of pp65-positive/2 × 10⁵ PBLs examined on cytospin preparations stained with a pool of 3 pp65-specific monoclonal antibodies. Viremia (Vir; left y-axis) is expressed as the number of fibroblast nuclei positive for the HCMV IE antigen p72 after inoculation of 2 × 10⁵ PBLs onto human embryonic lung fibroblast cell cultures by the shell vial technique. DNAemia (DNA; right y-axis) is expressed as viral genome equivalents (GE)/10 μL whole blood.