The Ebola outbreak started weeks ago, officials say. Here’s a timeline of what we know

The outbreak has been declared a public health emergency of international concern by the World Health Organization and the death toll has risen to more than 100.

The outbreak has been declared a public health emergency of international concern by the World Health Organization and the death toll has risen to more than 100.

The outbreak has been declared a public health emergency of international concern by the World Health Organization and the death toll has risen to more than 100.