NCR3 and cytomegalovirus infection: Although both NKp30 and NKp46 were significantly decreased on immune-reconstituting NK cells early after HCMV infection\reactivation, we focused our analysis only on NKp30 since this Natural Cytotoxic Receptor (NCR) showed the highest degree of differential expression between R and NR at 8–12 months after h-HSCT (Figure 3, B and C).