British Ebola patient remains in critical condition

British Ebola patient Pauline Cafferkey remains in critical condition, officials in Britain confirmed Tuesday.

Cafferkey, a 39-year-old female health care worker, tested positive for the Ebola virus in late December after returning to Glasgow, Scotland from Sierra Leone.

The Royal Free Hospital in London, where she is currently being treated, said she was "in a high level isolation unit."

"There is no danger to patients or staff during this time. The Royal Free Hospital is open for business as usual, with in-patient, out-patient and emergency care continuing as normal," the hospital said in its latest statement.

On Saturday, the hospital announced that the condition of Cafferkey had "gradually deteriorated" over the past two days and was "critical."

Last week, she agreed to be treated with a new anti-viral drug to help her fight the disease, British doctors at the London hospital said.