The results (Figure 5(b)) demonstrated that the percentages of MHC II-, CD69-, and NKG2A/C/E-expressing cells in TLR3+ NK cells significantly increased after infection (MHC II: 76.59 ± 3.054% versus 92.92 ± 1.770%; CD69: 17.72 ± 1.257% versus 22.30 ± 0.3512%; NKG2A/C/E: 77.80 ± 2.498% versus 90.48 ± 1.626%, P < 0.05). This evidence concerns the gene CD69 and infection.