The Centers for Disease Control and Prevention (CDC) and other health agencies were working behind the scenes, painstakingly tracing anyone who may have come into contact with Duncan and quarantining those who might transmit the disease. Transmission in the US was nearly impossible, owing to the strength of the US health system, it was thought.
医疗和公共卫生专家一直在向公众保证没有理由产生恐慌情绪。疾病控制与预防中心（CDC）和其他医疗卫生机构一直在幕后工作，煞费苦心地跟踪任何曾与邓肯接触者并对可能的传播者进行隔离。人们想当然地以为由于美国医疗系统的实力雄厚，病毒在美国传播几乎是不可能的。