Norway on Tuesday repatriated a doctor who contracted Ebola in Sierra Leone while working for Doctors Without Borders (MSF), and whom the medical charity described as "in good spirits" despite the disease.

The patient -- a 30-year-old woman, according to medical sources -- was transported in a French air ambulance and then taken to the Oslo University Hospital, where she will remain in total isolation and receive experimental treatment.

Norway is currently trying to obtain the last available dose of the prototype ZMapp drug, senior drug official Steinar Madsen told specialised website Dagens Medisin.

Other experimental treatments, like Avigan and TKM-Ebola, have also been ordered.

"Despite the circumstances, our colleague is in good spirits," Anne-Cecilie Kaltenborn, secetary general of Medecins Sans Frontieres Norway, told a press conference.

No details about the state of health of the director -- the first Norwegian national to contract Ebola -- have been revealed.

But Norwegian health ministry official Bjoern Guldvog told TV2 Nyhetskanalen that the risk of her infecting others with the tropical virus was "minimal".