This invention provides methods and compositions for inhibiting Ebola virus and Ebola infection utilizing gene silencing siRNAs. The siRNAs can be targeted to one or more Ebola genes including NP, VP30, VP35, L polymerase, glycoprotein (GP), VP24, VP40, and intergenic overlapping regions selected from NP/VP35, VP35/VP40, GP/VP30, and VP24/L. A composition containing the siRNAs can be administered in a delivery vehicle such as liposomes.本發明提供利用基因沉默siRNA以抑制伊波拉(Ebola)病毒和伊波拉病毒感染之方法及組成物。該siRNA可靶向一或多種伊波拉病毒基因,其包括NP、VP30、VP35、L聚合酶、糖蛋白(GP)、VP24、VP40及選自NP/VP35、VP35/VP40、GP/VP30和VP24/L之基因間重疊區。含有該siRNA之組成物可經遞送載體(諸如脂質體)投予。