Infectious Diseases are an ever growing concern for medical professionals around the globe in today's world. They refer to the disorders caused by the pathogens like bacteria, viruses, germs or fungi. They are acquired by insect bites, consumption of contaminated food or water. These diseases are highly communicable and many of them can be fatal for the living species. Some of the widely known infectious diseases are HIV, Malaria, dengue fever, etc. This book attempts to understand the multiple branches that fall under this discipline and explores the recent researches in the field of infectious diseases. Therefore, this book will help readers in keeping pace with the rapid changes in the world. Coherent flow of topics, student-friendly language and extensive use of examples make this book an invaluable source of knowledge.