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Immunity is the body’s natural defense mechanism against harmful pathogens such as bacteria, viruses, fungi, and toxins. It enables the body to recognize foreign substances, neutralize them, and remember them for faster response in future encounters. Immunity can be broadly classified into innate immunity, which is non-specific and provides immediate defense, and adaptive immunity, which is specific and develops over time after exposure to antigens. Adaptive immunity involves the production of antibodies or immunoglobulins by B lymphocytes, which are a crucial component of the humoral immune response. Antibodies are specialized proteins that specifically recognize and bind to antigens, ____ _______ ___ __________ ____ __________ _________.
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