Ebola Death Toll in Congo at 31

First person infected was a health worker

A deadly outbreak of the Ebola virus has killed 31 people in northeastern Congo, more than doubling the death toll from a week ago, the UN health agency said Friday.

There have been 69 cases in all including nine confirmed by a lab, the World Health Organization said, and five of the deaths have been confirmed by lab work.

The Ebola virus has no cure and is deadly in 40 percent to 90 percent of cases. The disease causes severe internal bleeding.