Dr. Dhruv Kazi is associate director of the Smith Center for Outcomes Research in Cardiology and director of the Cardiac Critical Care Unit at Beth Israel Deaconess Medical Center. Stephen Morrissey, the interviewer, is the Executive Managing Editor of the Journal. D.S. Kazi, I.T. Katz, and A.K. Jha. PrEParing to End the HIV Epidemic — California’s Route as a Road Map for the United States. N Engl J Med 2019;381:2489-2491.