The outbreak of the deadly Ebola disease in West Africa has a "nasty sting in its tail" which is going to require the international community's ongoing help, a top UN health expert said on Wednesday.

The warning, by the World Health Organization's Dr Bruce Aylward, comes despite a huge drop in the number of new cases of infection.

More than 11,300 people have died in the three most affected countries, Guinea, Liberia and Sierra Leone.

It’s expected that Ebola will be contained by the end of the year, but WHO's Dr Aylward told Daniel Johnson, the international community still needs to be on hand to provide support in the event of a new outbreak.

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