TKT and infection: To further determine the antiviral effect of CEP on HSV replication, Hela cells were treated with CEP (3, 1.5, and 0.75 μg/mL) for 24 h after infection with HSV-1 (MOI = 10) for 2 h, and the RT-qPCR results show that the expression of immediate early genes (IE) ICP0, ICP4, and ICP22 (Figures 2A–C); early genes (E) ICP8 and TK (Figures 2D,E); and late gene (L) VP16 (Figure 2F) was suppressed after CEP treatment, suggesting that CEP could reduce HSV-1 viral replication in a dose-dependent manner.