Furthermore, there was no significant difference in the level of infection between CD27+ (mean 7.9%, range 6.2-10.4%) and CD27- (mean 9.4%, range 6.3-15%) MAIT cells, and both PD-1+ (mean 9.3%, range 6.5-14.5%) and PD-1- (mean 7.7%, range 6.1-10.2%) MAIT cells demonstrated similar levels of infection (Figure 2B). Here, CD27 is linked to infection.