This book focuses on a broad range of immunomodulators, including both natural and synthetic ones. It highlights their role in human health. The book discusses nanotechnology-based immunomodulators with special emphasis on different types of formulation to boost the immune system. It highlights the role of immunomodulators against different microbes. This book describes important topics such as Classification and uses of various immunomodulators; Potential role of herbs and spices on immune system; Immune booster activity of prebiotics; Recent advances of nutraceutical and functional foods in Immune health; Antioxidants and immunomodulation; Nanotechnology and immunomodulators in cancer; Immunomodulatory role for the treatment and management of tuberculosis; Immunomodulation in autoimmune disorders; Herbal immunomodulators and COVID-19; Role of Cytokines as Immunomodulators and Immunomodulatory effects of endocrine disrupting chemicals. This book covers various aspects of product innovation, development, and launching of nutritional and pharmaceutical products with reference to immunomodulators. This book is meant for researchers and students in the field of immunology and pharmaceutical sciences.