The World Health Organization says it expects the number of deaths from the Ebola virus in the Democratic Republic of Congo to pass the 1,000 mark today.
WHO Deputy Director General Dr Michael Ryan says all efforts to control the spread of the disease are being hampered by continuing violence in the region.
Numerous rebel groups are active in eastern Congo and there is also deep mistrust of health workers.
Some people still refuse to believe the Ebola virus is real.
Several treatment centres have been attacked in recent months. In April, Cameroonian epidemiologist Dr Richard Valery Mouzoko Kiboung was killed in an attack at the university hospital in Butembo.
The Ebola outbreak which began last August is already the second deadliest in history.