It summarized the clinical and experimental studies of anti - viruses effects of Ganlu Xiaodu Dan in the re- cent two decades, and showed that Ganlu Xiaodu Dan had good effects on virus infective diseases as viral hepatitis, hand - foot -mouth disease and herpes zoster,etc. But there were few experimental studies in vivo and in vitro on Ganlu Xiaodu Dan anti -viruses effects and its mechanism. So for,the mechani...