1. Center for Population-Level Bioethics and Department of Philosophy, Rutgers University, New Brunswick, NJ, USA
2. Department of Health Behavior, Society and Policy, Rutgers School of Public Health, Piscataway, NJ, USA
3. Division of Medical Ethics, Grossman School of Medicine, New York University Langone, New York, NY, USA
4. Emeritus Professor Department of Pediatrics, University of Pennsylvania. Vaxconsult, Doylestown, PA, USA