This book is based on the role of co-morbid disorder; beta thalassemia minor with iron deficiency anemia in the promulgation of beta thalassemia gene. This book explain the pathophysiology of co-morbid condition and its effect on hematological parameters and Hb-A2 levels. This book is useful for the medical students, general physicians,consultant hematologist and Pathologist. In the areas where beta thalassemia is more common genetic disorder this book will proved as useful tool to stop the propagation of beta thalassemia gene in homozygous state.