IMMUNITY TYPES AND BODY DEFENSE MECHANISMS

Abstract

This study focuses on the types of immunity and the mechanisms by which the human body defends itself against pathogens, allergens, and xenobiotics. It examines both innate (natural) and adaptive (acquired) immunity, highlighting the roles of B- and T-lymphocytes, antibodies, cytokines, and the complement system. Various diagnostic and research methods, including ELISA, flow cytometry, PCR, and cytokine profiling, were employed to evaluate immune responses. The clinical significance of immunity is emphasized in the diagnosis and management of infectious, autoimmune, allergic, and immunodeficiency conditions, as well as in assessing vaccine efficacy and immune memory. Results demonstrate that innate immunity provides rapid, non-specific protection, while adaptive immunity ensures targeted and long-lasting defense. Immunological testing is critical for early diagnosis, monitoring disease progression, and guiding therapeutic interventions. This study underscores the essential role of immunology in modern medicine for disease prevention, diagnosis, treatment, and vaccination strategies.