The World Health Organization says the ongoing Ebola outbreak in West Africa is one of the most challenging it's ever faced. The outbreak's resulted in more than 110 deaths, Guinea remaining the center with 157 suspected or confirmed cases of Ebola; another 21 cases are suspected or confirmed in Liberia. ______________________. I'm Ray Kouguell, VOA New, details on these and other stories on our website at voanews.com. 世界卫生组织称,在西非持续爆发的埃博拉病毒是其迄今为止面临的最严峻形势之一.病毒爆发现已导致超过110例死亡,几内亚仍旧是疫情重灾区,已报告157例疑似或已确认的埃博拉病例,而利比亚疑似或确诊病例有21起. _____________________. 我是雷`寇格尔,美国之音新闻.更多详细内容请访问官网voanews.com.