Updated

Doctors Without Borders says one of its staff members has contracted Ebola while working in Liberia and will be evacuated to France.

In a statement Wednesday, the medical charity said the female French employee developed a fever on Tuesday.

The disease is spread by direct contact with the bodily fluids of the sick, leaving health care workers especially vulnerable to infection.

However, Doctors Without Borders has to date only had six local staff fall sick with Ebola, and it was never clear if they became sick through their work or in the communities where they live.

The organization has more than 2,000 people working in the region, including 200 international workers.