DAKAR, Senegal (AP) — Health workers have made dramatic progress in controlling an Ebola outbreak in West Africa in recent weeks, a doctor with the World Health Organization said Friday.

The outbreak has been blamed for the deaths of at least 168 people in Guinea and Liberia. There is no cure and no vaccine for Ebola, which causes a high fever and severe bleeding. The outbreak is unusual for West Africa as the disease is typically found in the center and east of the continent.