Acquired Immunity

Adaptive/Acquired Immunity Pathogen-specific Develops after exposure

Lymphocytes White blood cells produced from stem cells in the bone marrow B cells – mature in the bone marrow T cells – mature in the thymus

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Primary Response First time your immune system encounters a pathogen Involves the production of antibodies that are specific to the pathogen Antigens – pieces of pathogens that antibodies recognize Antibodies – immunoglobulin proteins, recognize antigens

This process generally take around 2 weeks, during which time you are suffering from the infection Secondary Response – subsequent exposures to the same antigen, much faster, stronger When antigen is recognized by memory cells, plasma cells that produce antibodies are mass produced by mitosis