The director general of the World Health Organization (WHO) , Tedros Adhanom Ghebreyesus, warned on Tuesday of "the breadth and speed" of the Ebola epidemic that plagues the Democratic Republic of the Congo (DRC), where it has caused 131 deaths and 513 suspected cases. Ebola causes an extremely contagious hemorrhagic fever and has caused more than 15,000 deaths in Africa in the last half century. The who on Sunday declared an international health alert to make in the face of the epidemic unleashed in the DRC, a large central African country of more than 100 million inhabitants.