Veteran medical journalist Meredith Wadman discusses her book The Vaccine Race. It tells the timely, epic, and controversial story of the development of the first widely-used normal human cell line and, through it, important viral vaccines, including the vaccine for rubella (German measles). Far from being an instrument of history, vaccine development in the modern era is targeting new (and reemerging) infectious diseases, including Ebola, Zika, Influenza and Respiratory Syncytial Virus (RSV). Dr. April Killikelly, a scientist at NIH's Vaccine Research Center, discusses the latest tools and technologies used to design tomorrow’s vaccines.