Given the healthcare worker's recent exposure to Duncan, she was "self-monitoring" for any symptoms of Ebola and—according to the CDC—should not have traveled on a commercial airline until the incubation period for the disease had ended.
She should be charged with attempted murder, IMO.
She called the CDC before her flight and they
cleared her for the flight. Yes, she shouldn't have flown but the CDC is at fault for not being more vigilant here.