The international medical charity Doctors without Borders says the Ebola epidemic in West Africa is out of control and not enough is being done to isolate those who may have the virus.
Officials say they have found hundreds of cases in Guinea, Liberia, and Sierra Leone and that hundreds have died.
Doctors say they have reached their limit of what can be done to fight the outbreak. They say there is fear and a lack of understanding in local communities of how the disease spreads.
The group, known by its French acronym MSF, says some people become infected at funerals, where controls have not been implemented. It also blames the spread on people moving around looking for treatment and visiting family members.
Doctors Without Borders and the World Health Organization are providing medical and other support to health ministries to help them fight the disease.
The highly contagious and extremely deadly illness is named for the river in the Democratic Republic of Congo. There is no known specific treatment.