Nurse killed, responder injured in Ebola alert attack in DRC, WHO says
Attack in Bafwasende is latest hit on health workers as outbreak reaches four countries
A nurse has been killed and another health worker severely injured while responding to an Ebola alert in the Democratic Republic of the Congo, according to the World Health Organization, in the latest of a series of attacks that authorities say is hampering efforts to slow the world's fastest-growing Ebola outbreak.