What is the infectious agent that causes Ebola hemorrhagic fever? Ebola, fever, agent, What, causes

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What is the infectious agent that causes Ebola hemorrhagic fever?

　

Ebola hemorrhagic fever is caused by several Ebola viruses. Ebola viruses are members of the filovirus family; when magnified several thousand times by an electron microscope, these viruses look like threads (filaments). Ebola virus was discovered in 1976 and named for a river in Zaire, Africa, where it was first detected.