NEJM This Week — July 31, 2025

Featuring articles on myeloma, mitochondrial DNA disease, cardiac surgery, and squamous-cell carcinoma; a review article on motor vehicle crash prevention; a case report of a woman with seizure-like activity and odd behaviors; a Medicine and Society article on the evaluation of occupational pulmonary impairment; and Perspectives on Covid-19 vaccines, on public policies, and on living on the edge of the valley of the sick.