The first patient to be treated for ebola in the US is improving in an Atlanta hospital.
The 2nd American infected with the ebola virus is expected there later this week.
Missionaries Nancy Writebol and Dr. Kent Brantly contracted the virus in Liberia.
A specially-equipped plane that's going to get Writebol, brought Brantly to Atlanta on Saturday.
Brantly was seen on video, walking by himself into Emory University Hospital.
Both patients received an experimental serum in Liberia called "Z-Mapp.
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 withhold judgment as to whether that was completely related to the antibody," said Dr. Anthony Fauciwith the Natl. Institute of Allergy & Infectious Diseases.
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.
The ebola outbreak has killed more than 800 people in Africa this year alone.