The second American infected with the Ebola virus is expected there on Tuesday.
Missionaries Nancy Writebol and Doctor Kent Brantly contracted the virus in Liberia.
The specially-equipped plane that's going to get Writebol, brought Brantly to Atlanta Saturday. Incredibly, he was seen on video, walking by himself into Emory University Hospital.
Both patients received an experimental serum in Liberia called ZMapp.
One doctor described their turnaround after taking the top-secret medication as "miraculous."
The serum hadn't even been tested on humans. Medical experts say much more testing is needed.
"As we all know in medicine, when we have, as they say, an n=1, or a single individual that had that experience, you note it, and you hope that's the way it has worked. But you've gotta withold judgement as to whether that was completely related to the antibody," Dr. Anthony Fauci, Director at the Nationall Institute of Allergy and Infectious Diseases (NIH), said.
Brantly's wife tells the charity he works for that he's in good spirits and he thanked everyone for their prayers. Supporters in several states held services to pray for the pair.
"I think today was a very uplifting and positive worship service, where earlier in the week I was expecting a sad one," Kent Smith, Elder at Southside Church of Christ, said.
The Ebola outbreak has killed more than 800 people in Africa this year alone.
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