CMV reactivations during the first 400 days posttransplant. The occurrence of each reactivation in each 50-day interval through day 400 after transplant is depicted by a dark circle on the timeline for the 13 of 15 CMV-seropositive patients that reactivated CMV. The number in parentheses indicates the maximum CMV DNA copy number per microliter observed for each patient. The survival (days) after transplant is shown in the column to the right of each patient timeline.