SEATTLE -- A second American infected with the potentially deadly Ebola virus is expected to return to the United States Tuesday. While the Centers for Disease Control and Prevention said a widespread outbreak in the U.S. is unlikely, it's not impossible for new cases to show up in the states.

Nancy Writebol, a medical missionary aiding in the treatment of Ebola victims in Liberia, was scheduled to leave Africa early Tuesday morning on a specially-equipped evacuation plane.

The first patient to be brought to the U.S., Dr. Kent Brantly, was showing signs of progress, according to CDC official. A Christian aid organization in Africa said Brantly received a dose of an experimental serum before he was flown to Atlanta, according to NBC News. However, no details on the serum's ingredients were provided.


By far, this has been the most alarming outbreak of the virus since it was discovered decades ago. In speaking about possible future cases in the United States, CDC director Dr. Tom Frieden said on Face The Nation, ... Could we have another person here ... could we have a case or two? Not impossible.

American health officials said bringing both infected Americans home is best way to begin working to bring an end to the outbreak.

Most of the medical care consists of supportive care, and our sense is -- based on speaking to providers in that part of the world -- that given our training, given our knowledge, given our unit ... we can provide that supportive care much better than can be supplied in their current environment, said Dr. Jack Kearse of Emory University.

Ebola has already claimed 728 lives in western Africa so far this year. The current mortality rate is about 55 percent. Fifty American health experts are set to travel to Africa in hopes of pinpointing a source of the outbreak, according to reports from the BBC.

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