This book is a comprehensive study of diverse aspects of autoimmune diseases and their impacts. Autoimmune diseases stand for a group of more than 60 diverse chronic autoimmune disorders that distress roughly 6% of the population. It arises when the immune system vigorously targets and destroys own tissue which results in disease, with major examples being Lupus and Type 1 diabetes. The immune system is structured to defend the body from unfamiliar pathogens such as viruses and bacteria. However, throughout the procedure of generating immune cells for this reason; as a harmful effect, self-reactive immune cells are also generated. This book intends to present some resourceful information with several diagrams and case studies regarding the above stated topic.