FIGURE 1.

Definition of the CMV PCR triplicate, and the different outcomes. The CMV PCR triplicate consist of 3 consecutive samples, with ≤ 7 days between the second (index sample) and the third (response sample) CMV PCRs. There are 3 different outcomes of this model: (1) negative control triplicates, were all 3 CMV PCRs in the triplicate are negative; (2) CMV triplicates indicating CMV infection were both the indicator and response sample are positive; (3) CMV triplicates indicating CMV blips, where the indicator sample being the only positive sample.