This volume discusses different aspects of immune homeostasis regulation and its dysregulation during various diseases, including infections, cancers, neurodegenerative diseases, autoinflammation, autoimmune diseases, and immunodeficiency, along with immunological, genetic, cell biology, and molecular biology techniques designed to understand immune homeostasis at different stages. The chapters in this book cover topics such as T cell subsets; monocyte-myofibroblast immunomodulation in a 3D co-culture system; human peripheral blood mononuclear cells in patients with neurodegenerative diseases; and CRISPR-Cas9 induced gene-editing in primary human monocytes. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Cutting-edge and comprehensive, Immune Homeostasis: Methods and Protocols is a valuable resource for both novice and experts researchers interested in learning more about this important and developing field.