Here's What Scientists Do When They Find Someone With Ebola

Every Ebola outbreak in history has been contained using a procedure that is both simple and crucial. That process, known in epidemiology as contact tracing, refers to the science of tracking down all potential cases of a disease. "In public health we do contact tracing all the time, every day around the year, whether it's for tuberculosis or sexually transmitted disease or meningitis or measles or other things," said Centers for Disease Control and Prevention director Tom Frieden on a call wit...