1. From the Office of Vaccines Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD (P.R.K., M.G.); the Department of Biostatistics, University of Washington, Seattle (T.R.F.); the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford (R.P., V.B.), and the Oxford Vaccine Group, Department of Paediatrics, University of Oxford and National Institute for Health...