TEXT BOOK OF IMMUNOLOGY

Immunology is the science that the study of immune system to antigenic challenges and how they are used to resist infection.The immune system protect us from various diseases. Antigens are a substance that can be produce specific immune response, when it is introduce into the tissue of animal and can react specifically with the product of immune response. Antibodiesare active serum proteins formed in response to antigen and react specifically that antigen. Immunity refers to the general ability of a host to react particular infection or disease.