Patient Nina Pham, center, with her mother Diana Pham, right, and sister Cathy Pham, left, smiles as members of the NIH staff outside applaud during a news conference at NIH in Bethesda, Md., Friday, Oct. 24, 2014. Pham, the first nurse diagnosed with Ebola after treating an infected man at a Dallas hospital is free of the virus. The 26-year-old Pham arrived last week at the NIH Clinical Center. She had been flown there from Texas Health Presbyterian Hospital Dallas. (AP Photo/Pablo Martinez Monsivais)