Soyasaponin II is a saponin with antiviral activity. Soyasaponin II inhibits the replication of HSV-1, HCMV, influenza virus, and HIV-1. Soyasaponin II shows potent inhibition on HSV-1 replication. Soyasaponin II serves as a inhibitor for YB-1 phosphorylation and NLRP3 inflammasome priming and could protect mice against LPS/GalN induced acute liver failure.