Poliovirus article 16 antiviral activity 12 nonhuman 12 unclassified drug 12 plant extract 10 Antiviral Agents 8 Poliomyelitis virus 8 Vesicular stomatitis virus 8 controlled study 8 plant leaf 8 Animals 6 Cercopithecus aethiops 6 Meliaceae 6 Plant Extracts 6 Vero Cells 6 antivirus agent 6 medicinal plant 6 virus infectivity 6 Argentina 5 Arenavirus 4 Cedrela 4 Cedrela tubiflora 4 Cell Survival 4 Chemical Fractionation 4 Chloroform 4 Herpes simplex virus 1 4 Herpesvirus 1, Human 4 Methanol 4 Methanolic extracts 4