KLRC1 and infection: The expression of NKG2A/C/E on TLR3− NK cells significantly increased after infection (70.23 ± 0.6203% versus 77.18 ± 1.348%, P < 0.05), while the percentage of NKG2D on TLR3− NK cells was significantly decreased after infection (61.08 ± 3.683 versus 13.64 ± 1.682, P < 0.05).