Dr. Mark Pallansch is director of the Division of Viral Diseases at the National Center for Immunization and Respiratory Diseases. Stephen Morrissey, the interviewer, is the Managing Editor of the Journal. M.A. Pallansch. Ending Use of Oral Poliovirus Vaccine - A Difficult Move in the Polio Endgame. N Engl J Med 2018;379:801-3.
