The death rate for Marburg virus is nearly 90%. There are no approved vaccines and treatments. So how did Rwanda achieve what one doctor calls an "unprecedented" success in controlling its outbreak?

Rwanda is dealing with its first-ever outbreak of the Marburg virus. It's related to Ebola and has a mortality rate as high as 88%. What do disease experts say about the global risk?

The first outbreak this year was in Equatorial Guinea, which has seen 20 deaths already. Now there are cases reported in Tanzania as well for this infectious disease with a high fatality rate.