NEJM This Week — September 24, 2026

This week, we feature new research on anticoagulation for atrial fibrillation, treatment for narcolepsy, and gene and cell therapies for multiple myeloma and Wiskott–Aldrich syndrome. We review the clinical use of common genetic variants and follow a case of a young child with fatigue and frequent falls. Perspectives explore access to sickle cell therapies, child health, and biomedical science.