In its early stages, Ebola resembles many common illnesses. A sore throat, a fever. But in the days or weeks of incubation following infection, the virus grips it victims with symptoms including bleeding eyes and vomiting. Survival without medical treatment is unlikely. Although the virus can only be contracted through bodily fluids, and not through casual contact, it is difficult to screen for. Preventing exposure to bodily fluids remains a challenge in countries where healthcare workers are few and underfunded and where families often care for and bury their own dead. With overcrowded clinics and hospitals, the sick...