New York City's first confirmed case of Ebola has raised complicated logistical issues of how to trace the possible contacts of an infected patient in a city of more than 8 million people with a sprawling mass transit system and a large population of workers who commute every day from surrounding suburbs and states. By the time the patient, Dr. Craig Spencer, an emergency doctor who had recently returned from Guinea, arrived at Bellevue Hospital Center in Manhattan by ambulance on Thursday, he was seriously ill, officials said. Dr. Spencer complicated the tracing process when he told health officials that just the ... (full story)