Evidence suggests that many Ebola infections are asymptomatic. 证据显示许多埃博拉病毒的感染是无症状的。There is no treatment for Ebola haemorrhagic fever.对埃博拉病毒造成的出血热没有治疗办法。A doctor who had treated an Ebola patient may have been symptomatic when he boarded the plane. 一位曾治疗过埃博拉患者的医生在登机时可能已显露症状。