Strikingly, in the first month of infection, viral load was inversely associated with the number of CD96−CD226+NK cells among NK cells especially TIGIT−NK cells (Figure 3D, r = −0.56, P = 0.023; r = −0.54, P = 0.029, respectively), but positively associated with the amounts of CD96+CD226− cells among NK cells especially TIGIT−NK cells (Figure 3E, r = 0.52, P = 0.041; r = 0.55, P = 0.026, respectively). Here, CD226 is linked to infection.