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Download Basic & Clinical immunology, 2nd year Clinical Laboratory
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CD4+ CD4+ CD8+ Lymph node Naïve T cells can live for many years 3-5 days 3 times/day >10000 folds Immunity to extracellular bacteria Immunity to intracellular bacteria Bacteria in the cytosol activate CTLs against bacteria-infected cells Immunity to viruses The defense mechanisms used to clear a primary infection are identified by the red shading of the boxes where these are known. Yellow shading indicates a role in protective immunity. Paler shades indicate less well established mechanisms.
