Dr. Martin Salia, who contracted Ebola in Africa and was later flown to the United States, has died, officials with Nebraska Medical Center said. Salia is the third patient treated for the virus at the medical center. "It is with an extremely heavy heart that we share this news," Dr. Phil Smith, medical director of the Biocontainment Unit at Nebraska Medical Center and professor of infectious diseases at the University of Nebraska Medical Center, said in a statement.