As the number of cases in West Africa rises, so does the potential for outbreaks outside of that context. And when members of the international community cannot contain the epidemic, the richest and most powerful actor, namely the US, has an obligation to step in and try to do so.
事实上，尽管埃博拉病毒在美大规模爆发的可能性依然很小，但我们绝无理由因此而自满。随着西非患病人数的增加，也增加了西非以外地区疫情爆发的危险。当国际社会无法控制疫情时，最富裕也最强大的国家美国有义务接过责任、勇于承担。