Intriguingly CD4+ (Figure 6A) and CD8+ (Figure 6B) T cells showed a significant increase of EGFR expression in the METH exposed LCMV infected group than LCMV alone by 56 days post infection, while a trend of increased expression in the METH treated group was observed at all time-points analyzed (Figure 6). The gene discussed is CD4; the disease is infection.