Congo's fight against Ebola shows some progress but vigilance needed

While prevention methods, vaccination rates, experimental treatments and community outreach appear to have made progress in slowing the rate of deadly Ebola infections in the Democratic Republic of the Congo, top public health officials warn that this improvement is endangered because two cities, Beni and Butembo, have become hotspots.

What's new: "Significant risks for further spread of the disease remain, " World Health Organization officials warned in a statement Thursday. WHO is concerned about lost access to people who are considered "contacts" of the infected, as well as other factors like some remaining pockets of resistance to treatment.