Ebola: 'There's no cure but we know how to control virus'

The World Health Organization and leaders of West African nations affected by the Ebola outbreak are to announce a joint $100m (£59m; 75m euro) response plan.

They will meet in Guinea on Friday to launch the initiative aimed at tackling a virus which has claimed 729 lives.

Sierra Leone's president has declared a public health emergency over the outbreak after 233 people died there.

Director of the Institute of Infection and Global Health Professor Tom Solomon welcomed the announcement and played down fears of a pandemic.