Paul Sax, MD, FIDSA, speaks with Adam Ratner, MD, MPH, Professor of Pediatrics and Microbiology at NYU Grossman School of Medicine and Director of the Division of Pediatric Infectious Diseases at Hassenfeld Children’s Hospital and Bellevue Hospital Center, about his book, "Booster Shots: The Urgent Lessons of Measles" and the rise of vaccine preventable diseases.