The head of the World Health Organisation 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.
Ebola spreads through human contact with a sufferer’s bodily fluids.
Initial flu-like symptoms can lead to external haemorrhaging from areas like eyes and gums, and internal bleeding which can lead to organ failure.
Ebola kills up to 90 per cent of those infected with patients having a better chance of survival if they receive early treatment.