More than two months since an Ebola outbreak was declared in an eastern part of the Democratic Republic of Congo, health officials are still struggling to end it.
So far at least 130 people have been infected. Last week the World Health Organization declared that the risk has gone from "high" to "very high" that the disease will spread to other parts of the country and to neighboring countries.
Yet some key health officials remain optimistic that it won't actually come to that.
How is that possible?