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ATLANTA — Two American aid workers who contracted Ebola in Liberia are virus-free and have been released from Emory University Hospital.

“Today is a miraculous day. I am thrilled to be alive, to be well and to be reunited with my family,” U.S. Ebola patient Dr. Kent Brantly said Thursday at a press conference at Emory University Hospital, from which he has been discharged.

The other American patient, Nancy Writebol, was released Tuesday from the same hospital and is choosing not to make public comments, doctors said.

Brantly  thanked all those who treated him and prayed for him.

“I serve a faithful God who answers prayers,” he said. Along with the medical professionals and resources that helped treat him, “God saved my life,” he said.

Writebol, 59 and a missionary doctor, Ken Brantly, 33, were flown from Liberia earlier this month for treatment at Emory’s special containment unit — one of four in the U.S.

Ebola has infected at least 2,100 people and killed 1,145 in Liberia, Sierra Leone, Guinea and Nigeria, according to the World Health Organization.

Both Writebol and Brantly were treated with the experimental drug Zmapp, which was developed by San Diego biotech firm Mapp Biopharmaceutical Inc. The treatment had been tested on monkeys, but it had never before been used to treat humans.

No effective treatment for Ebola has gone through clinical trial on humans, but patients are given fluids and other treatments in hopes of stabilizing them long enough for their immune systems to eventually fight off the virus.

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