Prof. Dr. Young Joo Han, MD, PhD, is a pediatric intensivist and clinical researcher specializing in global child and adolescent health, critical illness epidemiology, and severe infectious diseases. Dr. Han received medical training at Seoul National University College of Medicine, Seoul, Republic of Korea, and completed residency and fellowship training in pediatrics and pediatric critical care medicine at Seoul National University Hospital. Currently, Dr. Han serves as a Clinical Associate Professor at Yonsei University College of Medicine, Seoul, Republic of Korea. Dr. Han’s research focuses on severe infections, acute respiratory failure, and critical illness epidemiology using large-scale population health datasets. Recent academic work includes studies on severe infections and acute respiratory failure based on Global Burden of Disease (GBD) data. In addition, Dr. Han has conducted research on COVID-19, sepsis, and the microbiome. Dr. Han is also actively involved in the development of the Korean Pediatric Critical Care Registry. Dr. Han has contributed to research exploring pediatric critical illness, mortality burden, and global health inequalities among children and adolescents. Dr. Han is a member of the Korean Society of Critical Care Medicine and the Korean Society of Pediatric Critical Care Medicine. His work aims to improve the understanding of critical illness and health disparities in pediatric populations worldwide.