Ebola virus disease (EVD) (or Ebola hemorrhagic fever (EHF)) is the name for the human disease which may be caused by any of four of the five known ebola viruses. These four viruses are: Bundibugyo virus (BDBV), Ebola virus (EBOV), Sudan virus (SUDV), and Taï Forest virus (TAFV, formerly and more commonly Côte d’Ivoire Ebolavirus (Ivory Coast Ebolavirus, CIEBOV)). EVD is a viral hemorrhagic fever (VHF), and is clinically nearly indistinguishable from Marburg virus disease (MVD).
Ebola, which manifests itself as a hemorrhagic fever, is highly infectious and kills quickly. It was first reported in 1976 in Congo and is named for the river where it was recognised, according to the Centres for Disease Control and Prevention.
Scientists don’t know the natural reservoir of the virus, but they suspect the first victim in an Ebola outbreak gets infected through contact with an infected animal.
Major Ebola outbreak in DR Congo