nonhuman 273 article 249 controlled study 244 cytotoxicity 239 unclassified drug 192 Animals 184 human 184 priority journal 183 animal cell 160 Humans 143 human cell 132 mouse 100 in vitro study 94 antiviral activity 92 Article 88 Mice 81 animal 81 drug cytotoxicity 81 Antiviral Agents 75 apoptosis 67 Cercopithecus aethiops 66 Vero Cells 66 drug structure 65 drug effects 60 antivirus agent 58 Cytotoxicity 57 Cell Survival 54 Cell Line, Tumor 52 drug isolation 52 protein expression 50