Ebola virus disease is a type of viral fever and is caused by viruses that belong to Ebola virus genus. There are 5 viruses:
- Bundibugyo virus (BDBV)
- Taï Forest virus (TAFV)
- Sudan virus (SUDV)
- Ebola virus (EBOV, also known as Zaire Ebola virus)
- Reston virus (RESTV)
Except for Reston virus, all the other four viruses cause Ebola virus disease in humans. Of these four, Ebola virus, which is the cause of current outbreak across the globe, is most fatal and has become a matter of grave concern.