Aid worker Nancy Writebol becomes second American infected . Dr. Kent Brantly is ill after treating Ebola patients in Liberia last week . He told officials he had no direct contact with anyone with the virus nor had he attended the burial of anyone who died of Ebola . The U.S. Centers for Disease Control and Prevention said Thursday that the first case of a person who contracted Ebola outside West Africa has been diagnosed in Texas. A doctor working on the Ebola outbreak in Sierra Leone is also infected .
Aid worker Nancy Writebol becomes second American infected . Dr. Kent Brantly is ill after treating Ebola patients in Liberia last week . The U.S. Centers for Disease Control and Prevention said Thursday that the first case of a person who contracted Ebola outside West Africa has been diagnosed in Texas. A doctor working on the Ebola outbreak in Sierra Leone is also infected .