Ebola virus disease Or Ebola A human disease caused by the Ebola virus. This disease has a high mortality rate between 50% and 90% of those infected with the virus. Ebola virus disease caused by a virus, four of the five species of the genus Ebolavirus Wong Filoviridae the Mononegavirales. Four types of viruses, including Bundibugyo virus (BDBV), Ebola virus (EBOV), Sudan virus (SUDV) and Taï Forest virus (TAFV).