The Ebola virus. No-one knows exactly where it com男人四十电视剧es from but one thing is certain - it's one of the most virulent infections known to science. This special episode of Horizon meets the scientists and doctor青岛市长胡s from all around the world looking for the cure and hears first花花游龙 小说-hand accounts of what it's actually like to catch - and survive - this terrible disease.