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Tom Frieden(L),the director of the U.S. Centers for Disease Control and Prevention (CDC) testifies during a hearing on Examining the U.S. Public Health Response to the Ebola Outbreak before the Oversight and Investigations Subcommittee at Capitol Hill in Washington D.C., capital of the United States, Oct. 16, 2014. A hospital in Texas where an Ebola patient died and two nurses were infected apologized Thursday for mishandling the deadly disease, as the National Institutes of Health (NIH) prepared to treat the first nurse who contracted the virus while caring for the deceased. (Xinhua/Bao Dandan)