IL17A and infection: Unexpectedly, the percentages of IL-17+ NK cells increased significantly after infection from both WT (noninfected: 1.74 ± 0.09%; infected: 5.06 ± 1.71%, P < 0.05, Figure 1(f)) and TLR3 KO mice (noninfected: 1.31 ± 0.05%; infected: 2.31 ± 0.38%, P < 0.05, Figure 1(f)).