Nurse Pauline Cafferkey has made a "significant improvement" after becoming unwell with meningitis caused by the Ebola virus.
The 39-year-old from Glasgow has been receiving treatment in the Royal Free Hospital's high level isolation unit since October 9 and was at one point in a critical condition.
On Wednesday, the hospital's Dr Michael Jacobs revealed she had not been reinfected with Ebola, but that the virus had re-emerged to cause meningitis.
"I'm really pleased to tell you that in the last few days she has made a significant improvement," Dr Jacobs told a press conference.
He said Ms Cafferkey was still bed-bound but was talking freely and able to eat a little.
Dr Jacobs said staff were "delighted" with her progress but that she had a "long recovery ahead of her" and would remain in hospital for some time.