This dataset includes PBMC CyTOF files by NK-centric panel (singlet cells or live cells after debarcoding) for 11 CMV viremic patients and 9 non-viremic patients. Each patient have 3 to 5 files, which indicate different time points (day 0 of transplantation, at a time point prior to viremia, and then post-viremia at approximately 1-week, 1-month, and long-term (>1 month)).