KLRB1 and infection: The proportion of CD3+CD4+CD161+ T cells was lower in patients who developed infection before engraftment (5.28 ± 0.60% versus 7.32 ± 0.83%, P = 0.045) and CMV reactivation (4.46 ± 0.61% versus 6.74 ± 0.63%, P = 0.041).