Objective(s) The aim of this study was to search for new antiviral agents from herbal medicines. Ethanol extracts of C. semipervirens, C. semipervirens var. horizontalis and C. semipervirens cv. Cereiformis were used in experiments to test their influence on herpes viruses (HSV-1). Materials and Methods HeLa cells monolayers were infected with herpes viruses (HSV-1). Antiviral activity of th...