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The immune system is a complex network of cells, tissues, and organs that work together to defend the body against harmful pathogens, such as bacteria, viruses, and parasites. It identifies and eliminates these invaders while distinguishing them from the body’s own cells. Key functions include recognizing foreign substances, producing antibodies, and activating immune responses. A well-functioning immune system is crucial for overall health, helping to prevent infections and diseases. Factors like nutrition, exercise, and stress can influence its effectiveness.
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