Case fatality rates from past outbreaks caused by the virus have ranged from 30-50%...

Travel to the U.S. from Uganda, Congo or South Sudan is being impacted by an ongoing Ebola outbreak.

More than 300 suspected cases and 88 suspected deaths have so far been reported, primarily in Congo but also in neighboring Uganda.

CDC says risk to Americans is low, but did not say whether any Americans were exposed in Africa