article 22 herpes simplex virus 1 antiviral activity 20 nonhuman 20 animal cell 16 controlled study 14 Antiviral Agents 12 Herpesvirus 1, Human 12 cytotoxicity 12 priority journal 12 unclassified drug 12 antivirus agent 10 plant extract 10 vero cell 10 Cercopithecus aethiops 8 Seaweed 8 Vero Cells 8 herpes simplex virus 2 8 virus replication 8 Animals 6 Herpesvirus 2, Human 6 Support, Non-U.S. Gov't 6 concentration response 6 drug isolation 6 plant leaf 6 seaweed 6 virus adsorption 6 Acyclovir 4 Animalia 4 Antiviral 4