KLRC2 and cytomegalovirus infection: This study indicates that HLA-EUL40 CD8T cells share with NK cells a high level of CD45RA and CD56, the expression of CD57 (CD57+ NK cells) and NKG2C (NKG2C+ NK cells) for CD57+ and NKG2C+ NK subsets both induced by HCMV infection (39, 40).