A British nurse who was diagnosed with Ebola after returning from Sierra Leone is now in a critical condition, the London hospital treating her has said.
The Royal Free Hospital said it was "sorry to announce that the condition of Pauline Cafferkey has gradually deteriorated over the past two days," the BBC reported on Saturday.
Cafferkey, from South Lanarkshire, was given an experimental anti-viral drug and blood from disease survivors.
She was diagnosed in December after volunteering with Save the Children.
The public health nurse had traveled home via Casablanca, Morocco, and London's Heathrow Airport.
Cafferkey was screened for the disease at Heathrow and told officials she believed a fever might be developing.
Her temperature was taken seven times in total, six of which were within 30 minutes, and was normal each time, so she was allowed to fly home to Scotland.
The government's chief medical officer, Dame Sally Davies, has said questions have been raised about the airport screening procedure for Ebola following Ms Cafferkey's case.