WHO says about two thousand healthcare and frontline workers in South Sudan are to be offered Ebola vaccines to stop any importation of the viral disease from an epidemic in Congo.
South Sudan Uganda and Rwanda are said to be at high risk of having Ebola imported from an outbreak in eastern Congo.
The outbreak, which is concentrated in the North Kivu and Ituri provinces, is now the second biggest in history and has so far infected at least 450 people and killed at least 27.
