Visual Science’s 3-D model of the Ebola virus. The Ebolavirus was first described in 1976 during the Zaire ebolavirus outbreaks in Africa. It’s one of the most lethal viruses on Earth - once patients are infected, they develop a severe form of hemorrhagic fever that has a fatality rate of almost 90% in some cases. There have also been some fatalities resulting from laboratory accidents. Ebolavirus is one of a handful of viruses that need to be contained in Level 4 bio hazardous facilities.