No current treatment can cure viral hemorrhagic fevers, and immunizations exist for only a few types.

CNN: Viral hemorrhagic fevers

When viral hemorrhagic fevers occur in the United States, they're usually found in people who've recently traveled internationally.

CNN: Viral hemorrhagic fevers

Viral hemorrhagic fevers are spread by contact with infected animals, people or insects.

CNN: Viral hemorrhagic fevers

More effective repellents could play a major role in reducing the death toll from diseases spread by mosquitoes, including malaria, encephalitis, West Nile, dengue, hemorrhagic and yellow fevers.

BBC: NEWS | Science/Nature | Chemical key to mosquito biting