These comparative expression patterns of surface molecules between naive and CL13-infected mice were preserved on Day 30 after LCMV infection; however, the absolute expression of CD80 and CD86 was lower, whereas the expression of PD-L1 was higher, at 30 days post-CL13 infection than at 10 days post-CL13 infection (data not shown). This evidence concerns the gene CD274 and infection.