(CNN)Ebola virus disease has sickened 188 people and killed 118 in the Democratic Republic of Congo’s northeastern region, the World Health Organization reported Monday.
Of the total cases, 153 have been confirmed, and 35 are probable. Fifty-one people have survived the disease, according to WHO, the United Nations’ public health division.
On average, Ebola
— which causes fever, severe headache and in some cases hemorrhaging — kills about half of those infected, but case fatality rates in individual outbreaks have varied from 25% to 90%.