Nina Pham (2nd L, front row), the nurse who was infected with Ebola while caring for a patient from Liberia, attends a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)
Anthony Fauci (R), Director of the National Institute of Allergy and Infectious Diseases, speaks during a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)
Nina Pham, the nurse who was infected with Ebola while caring for a patient from Liberia, speaks during a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)
Nina Pham (2nd L, front row), the nurse who was infected with Ebola while caring for a patient from Liberia, attends a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)
Nina Pham (C), the nurse who was infected with Ebola while caring for a patient from Liberia, attends a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)
Anthony Fauci, Director of the National Institute of Allergy and Infectious Diseases, speaks during a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)
Anthony Fauci, Director of the National Institute of Allergy and Infectious Diseases,speaks during a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)
Nina Pham, the nurse who was infected with Ebola while caring for a patient from Liberia, speaks during a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)
Nina Pham (R), the nurse who was infected with Ebola while caring for a patient from Liberia, speaks during a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)
Anthony Fauci, Director of the National Institute of Allergy and Infectious Diseases, speaks during a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)
Anthony Fauci (R), Director of the National Institute of Allergy and Infectious Diseases, speaks during a news conference in Maryland, the United States, on Oct. 24, 2014. Nina Pham, who contracted Ebola while caring for a patient from Liberia was released from the hospital Friday, officials at the U.S. National Institutes of Health (NIH) treating her said in Maryland. (Xinhua/Bao Dandan)