aciclovir nonhuman 34 antiviral activity 30 article 26 controlled study 26 Herpes simplex virus 1 24 animal cell 20 antivirus agent 20 unclassified drug 20 Animals 18 Antiviral Agents 18 priority journal 16 Cercopithecus aethiops 14 Herpes simplex virus 14 Herpes simplex virus 2 14 Herpesvirus 1, Human 14 Vero Cells 12 Vero cell 12 drug synthesis 12 human 12 virus replication 12 Acyclovir 10 Antiviral activity 10 Human herpesvirus 1 10 carrageenan 10 cytotoxicity 10 Antiviral 8 Herpes Simplex 8 Humans 8 Mice 8