West African nations have imposed travel restrictions in a last-ditch attempt to stop the worst outbreak of Ebola, a disease with a mortality rate of up to 90 per cent that has killed nearly 700 people in Liberia, Sierra Leone and Guinea.
西非国家实行了旅行禁令，此举是遏止史上最严重的埃博拉病毒(Ebola)爆发的最后努力。埃博拉是一种致死率高达90%的疾病，已在利比里亚、塞拉利昂和几内亚导致近700人死亡。
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