Which of these is classified as an emerging virus that can have a direct impact on human health?

A. tobacco
B. mosaic virus
C. pneumonia lambda
D. Ebola

The correct answer is: D. Ebola.

Explanation:

Ebola Virus is a single-stranded RNA (ribonucleic acid) virus.The natural host of the virus is Fruit bat but it can also infect humans.The transmission of the virus into humans is mediated from infected bats through body fluids.The major disease caused by the virus is is Hemorrhagic fever. In this disease, the platelet (responsible for clotting of blood) count in the blood  drops far below normal. As a result, bleeding can get initiated both in the body interior or exterior. This disease can cause multiple organ failure and death.Recently, in the year 2018, the Central African country, Democratic Republic of Congo experienced a severely fatal endemic due to the Ebola virus that killed many people within a short period of time.