Nancy Writebol, left, and Dr. Kent Brantly, right, are seen in these photos provided by CNN
Two American aid workers who got infected with the deadly Ebola virus in Liberia have been discharged from an Atlanta hospital after three weeks of treatment, officials said Thursday.
Dr. Kent Brantly, 33, and Nancy Writebol, 59, show no evidence of Ebola, and generally patients do not relapse and are not contagious once they've recovered, the director of the hospital's infectious disease unit, told AP news agency.
At a news conference, Dr. Bruce Ribner of Emory University Hospital said the duo is of no public health risk.
At the news conference, Brantly choked up several times while thanking his aid group, North Carolina-based Samaritan's Purse, and the Emory medical team.
Brantly and Nancy Writebol received an experimental treatment called Zmapp, but it's not known whether the drug helped or whether they improved on their own, as has happened to others who have survived the disease.
The treatment is so novel that it hasn't been tested in people.
The limited supply of the treatment also was tried in a Spanish missionary priest, who died, and three Liberian health care workers, who are said to be improving.
Ebola is spread only through direct contact with the bodily fluids of sick people experiencing symptoms.
The Ebola outbreak has killed more than 1,300 people across West Africa.
The death toll is rising most quickly in Liberia, the World Health Organization said.
At least 2,473 people have been sickened across West Africa, mainly Guinea, Sierra Leone, Liberia and Nigeria, more than the caseloads of all the previous two-dozen Ebola outbreaks combined.