b'Dr. Mark Pallansch is the retired director of the Division of Viral Diseases at the Centers for Disease Control and Prevention. Stephen Morrissey, the interviewer, is the Executive Managing Editor of the Journal. M.A. Pallansch. Circulating Poliovirus in New York \\u2014 New Instance of an Old Problem. N Engl J Med 2022;387:1725-1728.'