Dr. Warren Zapol ’62, an anesthesiologist at Massachusetts General Hospital who made breakthroughs in studying the impact of inhaled nitric oxide, died on Dec. 14, 2021, at the age of 79, reports Bryan Marquard for The Boston Globe. “Warren’s discovery and demonstration that nitric oxide is a highly effective therapy for pulmonary hypertension in newborns and in adults is one of the most significant achievements in recent intensive care medicine history,” says Prof. Emery N. Brown, director of the Harvard-MIT Health Sciences and Technology program.