WHO: 120 healthcare workers die in outbreak as Ebola continues to spread (PHOTOS)



SEIRRA LEONE(CNN) -- One hundred and twenty health care workers have died in the Ebola outbreak, and twice that number have been infected, the World Health Organization said.

The fact that the disease has killed so many people working to care for infected patients is making it increasingly hard to combat the disease in western Africa, the group said.

"It depletes one of the most vital assets during the control of any outbreak. WHO estimates that, in the three hardest-hit countries, only one to two doctors are available to treat 100,000 people, and these doctors are heavily concentrated in urban areas."