Texas Nurse Nina Pham Moved to National Institutes of Health

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Nurse Nina Pham steps off of a plane to a waiting ambulance that will take her to the National Institutes of Health in Bethesda, Md., after arriving at Frederick Municipal Airport in Frederick, Md., Thursday, Oct. 16, 2014.

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A plane with nurse Nina Pham aboard sits on a tarmac at Frederick Municipal Airport in Fredercik, Md., Oct. 16, 2014.

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Medical staff in protective gear escort Nina Pham, exiting the ambulance, to a nearby aircraft at Love Field, Dallas, Oct. 16, 2014.

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Texas Health Presbyterian Hospital Dallas staff line the drive that exits the emergency room as they wait for an ambulance carrying Nina Pham to depart, Oct. 16, 2014, in Dallas.