Immunogenicity is the ability of a substance to provoke an immune response in the body. This includes the ability of a drug, vaccine, or other substance to induce an immune response that produces antibodies or activates immune cells. Understanding the immunogenicity of substances is important in fields such as drug development, vaccine design, and autoimmune disease research. Researchers study factors that influence immunogenicity, such as the structure of the substance, the route of administration, and the genetic background of the individual. The goal is to enhance the effectiveness and safety of therapeutic interventions by optimizing their ability to stimulate an immune response.