UK nurse Pauline Cafferkey is no longer critically ill with Ebola, London's Royal Free Hospital says.
In a statement, the hospital said she was "showing signs of improvement", the BBC reported on Monday.
Cafferkey, from Glasgow, was diagnosed with Ebola in December after returning from Sierra Leone. It was announced she was in a critical condition on 4 January.
The 39-year-old had volunteered with other UK NHS staff for the charity Save the Children in West Africa.
The full statement from the hospital said: "The Royal Free Hospital is pleased to announce that Pauline Cafferkey is showing signs of improvement and is no longer critically ill.
"She remains in isolation as she receives specialist care for the Ebola virus."
Cafferkey has been treated with experimental drugs and has received blood plasma from another British nurse, Will Pooley, who recovered from an Ebola infection last year.