Micrograph reveals human hepatocytes infected with the Ebola virus. The Ebola pathogen is a member of the Filoviridae family of RNA viruses. It is known to be spread through close contact with an infected host. Mortality rates of an individual with hemorrhagic fever range from 50-90%. Ebola virus disease (EVD), also known as Ebola hemorrhagic fever (EHF) or simply Ebola, is a viral hemorrhagic fever of humans and other primates caused by ebolaviruses. Signs and symptoms typically start between two days and three weeks after contracting the virus with a fever, sore throat, muscular pain, and headaches. Then, vomiting, diarrhea and rash usually follow, along with decreased function of the liver and kidneys. At this time some people begin to bleed both internally and externally.