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Pathogens are internalized into the body through various mechanisms, primarily involving the immune system's cells, such as phagocytes. The process begins when a pathogen, such as a bacterium or virus, comes into contact with the host's immune cells, typically dendritic cells or macrophages. These immune cells possess ___ ______ ________ _____ ________ __________ ____ _____ _________ __________.
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