IMMUNITY

The word immunity has kept interested the mankind for thousands of years. It is a biological term describing the state of having sufficient biological defenses to avoid infection and disease. Vertebrates possess an effective immune system preventing the invasion of bacteria, viruses and cancer cells. Immunity involves both specific and non-specific components. The immune system is amazingly complex consisting of network of cells, tissues and organs that work together to defend the body. Therefore, understanding the molecular and cellular mechanism of immunity and related diseases will help in improving our health.

Immunity, the body’s defense against pathogens, has fascinated humanity for centuries. From ancient perceptions of disease as divine punishment to modern scientific understandings, the concept has evolved significantly. This book delves into the nature of immunity, explaining both innate and adaptive immune responses. Innate immunity provides immediate protection through barriers and phagocytic cells, while adaptive immunity develops over time, involving specific responses by lymphocytes. The text covers both humoral and cellular immunity, as well as the dynamics of passive and active immunity. Through this, the book offers a comprehensive overview of immune system functions in health and disease.

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