Pathogen, A microorganism that causes disease, Transmission, The way a pathogen is passed from one host to another, Infection, When pathogens enter and multiply in the body, Antigen, A substance on a pathogen that triggers an immune response, Antibody, A protein produced by lymphocytes that binds to a specific antigen, Phagocytosis, The process of engulfing and digesting pathogens by phagocytes, Phagocyte, A type of white blood cell that engulfs pathogens, Lymphocyte, A type of white blood cell that produces antibodies, Immunity, The ability of the body to resist a specific pathogen, Barrier defence, Physical or chemical methods (like skin or mucus) that prevent pathogen entry.

Pathogens

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