'A miraculous day': Dr. Kent Brantly released from hospital after month-long battle with Ebola

A doctor at the hospital that treated two American aid workers who were infected with the deadly Ebola virus in Africa says their discharge poses no public health risk.

Officials announced the release of Dr. Kent Brantly and Nancy Writebol on Thursday. Brantly left Emory University Hospital on Thursday. Writebol left Tuesday. Family and officials say they're free of the virus. Writebol's husband says she left privately in a weakened condition to recuperate at an undisclosed location.

They were at the hospital nearly three weeks.

Dr. Bruce Ribner, medical director of the infectious disease unit at the hospital, said at a news conference that their release did not pose a public health risk.

Dr. Brantly, speaking for the first time, said he was glad that his sickness brought attention to the Ebola outbreak in West Africa, and stressed that the world continue to aid the people fighting the deadly disease.

At the news conference, Brantly said it is "a miraculous day."

Information from the Associated Press was used in this report.