Murder and mystery reach epidemic proportions when a devastating plague sweeps the country in this “harrowing medical horror story” (The New York Times) from the #1 bestselling author of Coma “The ultimate nightmare . . . spine-tingling intrigue and fever-pitched action.”—Associated Press   When the director of a Los Angeles health maintenance clinic succumbs, along with seven patients, to an untreatable—and virulently contagious—virus, Dr. Melissa Blumenthal is assigned by the Centers for Disease Control to investigate.   The California case is merely the first in a burgeoning series of outbreaks that occur in unrelated geographical areas but with puzzling commonalities: The locations are always healthcare facilities, and their victims are only physicians and their patients.   As her investigation takes increasingly bizarre turns, Melissa finds that behind the natural threat lurks a far more sinister possibility—sabotage—and soon finds herself facing the wrath of a powerful cabal, sworn to achieve its aims, no matter what the cost in human life—including Melissa’s.