The World Health Organization chief voiced concern on Tuesday about the “scale and speed” of an Ebola outbreak in the Democratic Republic of Congo which has killed an estimated 131 people. The WHO has declared the surge of the highly contagious haemorrhagic fever an international health emergency and was expected to hold an emergency meeting on the crisis on Tuesday. No vaccine or therapeutic treatment exists for the Bundibugyo strain of Ebola responsible for the latest outbreak of the disease,...