This book constitutes the refereed proceedings of the 11th International Conference onHealth Information Science, HIS 2022, held in Virtual Event during October 28–30, 2022.The 20 full papers and 9 short papers included in this book were carefully reviewed andselected from 54 submissions. They were organized in topical sections as follows: ​applications of health and medical data; health and medical data processing; health and medical data mining via graph-based approaches; and health and medical data classification.

Introduction to Chemical Graph Theory is a concise introduction to the main topics and techniques in chemical graph theory, specifically the theory of topological indices. The book covers some of the most commonly used mathematical approaches in the subject.