Health workers have called the Ebola outbreak in West Africa unprecedented, overwhelming and even out of control.
With 844 cases so far, it's the largest and deadliest outbreak since the virus was discovered in 1976. And it doesn't show signs of slowing down. On Tuesday, the World Health Organization reported 50 new cases in Liberia and Sierra Leone. Despite the current crisis, however, the likelihood of the virus's spreading beyond Africa is very low.
Here's what we know about this painful and deadly disease.
Click "source" to read more.