KLRC2 and infection: The persistence of this NKG2C+ subset several months after a CMV reactivation was one reason to propose them as an adaptive or memory-like form for NK cells.8 In the CMV model, the memory-like CD57+ compartment is replenished through the maturation of effector NKG2C+ NK cells, several months after the acute phase of infection, once viremia is controlled.8 The CMV-DNA levels were however not above the reactivation threshold in the patients of this study, suggesting that CMV reactivation did not occur here during PHI.