The Fifth Vial

From the blockbuster, eleven-time New York Times bestselling author comes a novel of medical suspense that begins with these chilling questions: Who ends up with the blood samples you routinely give for tests? What else are they being used for? Why don't you know? Take a Deep Breath. . . . In Boston, a disgraced medical student is sent to deliver a research paper that could save her career. . . . Four thousand miles away, in a jungle hospital in Cameroon, a brilliant, reclusive scientist, dying