Graphic illustration of Ebola virus
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Guinea Ebola outbreak 'challenging' - World Health Organisation

8 April 2014 Last updated at 23:04 BST

An outbreak of the deadly Ebola virus in West Africa is "one of the most challenging" the World Health Organisation (WHO) has ever faced, the organisation says.

The virus had now killed 101 people in Guinea and 10 in Liberia.

The WHO says it could take up to four months to subdue the outbreak.

Tulip Mazumdar reports.