London: The World Health Organisation (WHO) has said that the deadly Ebola virus is still "running ahead" of the global health watchdog's efforts to contain it.
According to the BBC, Director general Margaret Chan said the situation had improved in some parts of the worst-affected countries, but she warned against complacency.
She said that with the continuing outbreak of the killer virus, the risk to the world "is always there".
Chan said that Liberia was seeing some good progress, especially in Lofa county and the capital.
However, she added that while cases in Guinea and Sierra Leone were "less severe" than a couple of months ago, a large number of Ebola cases were still being reported.
The total number of deaths in Guinea, Liberia and Sierra Leone from Ebola is estimated to be around 6,331.
WHO says that more than 17,800 people have been infected with the virus.