KLRC2 and cytomegalovirus infection: Since the induction of NKG2C and CD57 expression on NK cells has been described during HCMV infection (4, 38), we identified and demarcated in the tSNE plot (Figure S1A in Supplementary Material), clusters associated with these markers to visualize the expression of other markers that associate with these HCMV-driven adaptive NK cells.