模仿文本：

But first, the World Health Organisation is holding an emergency meeting to discuss how to tackle the Ebola outbreak in West Africa. It's the worst ever recorded, and so far has killed over 800 people in Guinea, Liberia and Sierra Leone. The virus spreads mostly by contact with infected bodily fluids and up to 90% of the people who catch it die.

译文：

世界卫生组织召开紧急会议讨论如何应对在西非国家爆发的埃博拉病毒。这是有记载以来最可怕的病毒，到目前为止已经造成几内亚、利比里亚和塞拉利昂等地800余人丧生。该病毒主要通过接触被感染的体液来进行传播，致死率高达90%。