This week Thomas Eric Duncan, the first person diagnosed with Ebola in the United States, passed away. A Dallas-area hospital initially turned him away, and his death has raised questions about what might have happened if he had been diagnosed and admitted to the hospital sooner. As healthcare workers are forced to wait for symptoms of Ebola to materialize before they can treat patients, Laurie Garrett, a senior fellow for global health at the Council on Foreign Relations, argues that rapid diagnostic testing tools could be a game changer in this ongoing outbreak.