Explanation:

First option is corrext.

The Ebola virus was first identified in 1976 in the Democratic Republic of Congo (DRC) in a village near the Ebola River, from which it takes its name.

Ebola virus disease (EVD), formerly known as Ebola haemorrhagic fever, is a severe, often fatal illness in humans. The Ebola virus is transmitted to people from wild animals and spreads in the human population through human-to-human transmission.The Ebola virus causes an acute, serious illness which is often fatal if untreated. There are currently no licensed Ebola vaccines but 2 potential candidates are undergoing evaluation.