Antiviral effect of Folium Isatidis on herpes simplex virus type Ⅰ Anti-herpes Virus Action of Ethanol extract from the Root and Rhizome of Rheum officinale Baill. The Expression and Anti-apoptotic Function of Herpes Simplex Virus Type 2 Latency Associated Transcript-RL1 Efficacy of Xiaoxingzhang Guttae Ophthalmic Eye Drops in Treatment of Experimental Herpes Simplex Keratitis Effect of Radix Isatidis against herpes simplex virus type I in vitro