Jean Nachega is a professor of infectious diseases and the director of the Biomedical Research Institute at Stellenbosch University and an associate professor at the University of Pittsburgh School of Public Health. Stephen Morrissey, the interviewer, is the Executive Managing Editor of the Journal. A. Zumla and Others. Ebola at 50 — Lessons for Outbreak Response and Preparedness. N Engl J Med 2026;