The charity an American doctor infected with Ebola works for says he's now recovered from the virus and will be released today from an Atlanta hospital.

Dr. Kent Brantly and colleague Nancy Writebol were flown out of the West African nation of Liberia earlier this month and have been getting treatment at Emory University Hospital in Atlanta.

The hospital will hold a news conference later this morning to discuss the release of both health care workers.

Meanwhile, officials from the World Health Organization are visiting two hospitals treating Ebola patients in Liberia, where authorities have sealed off entire neighborhoods in an effort to stop the outbreak.

After clashes between protesters and security forces in the sealed-off slum of West Point, calm returned today. A nationwide nighttime curfew appears to have been put in place without major incident.

Ebola has killed more than 1,300 people in Liberia, Sierra Leone, Guinea and Nigeria. The disease is spreading fastest in Liberia.