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==Cell-Mediated==
 
==Cell-Mediated==
The cell-mediated response to viruses involves [[Lymphocytes#Cytotoxic CD8+|CD8+ T-cell]] mediated killing of virus infected cells. They are the main cells involved in the immune response to '''intracellular''' virus infection. Viruses are detected by the recognition of [[Major Histocompatability Complexes#MHC I|MHC I]]-peptide complex and infected cells are killed by apoptosis. Perforin and granzymes activate the caspase cascade and Fas-ligand triggers the Fas-mediated apoptosis pathway. Cytotoxic [[Cytokines|cytokines]] (especially TNF-α & TNF-β lymphotoxin) act on TNF receptors to induce programmed cell death.
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The cell-mediated response to viruses involves [[Lymphocytes#Cytotoxic CD8+|CD8<sup>+</sup> T-cell]] mediated killing of virus infected cells. They are the main cells involved in the immune response to '''intracellular''' virus infection. Viruses are detected by the recognition of [[Major Histocompatability Complexes#MHC I|MHC I]]-peptide complex and infected cells are killed by apoptosis. Perforin and granzymes activate the caspase cascade and Fas-ligand triggers the Fas-mediated apoptosis pathway. Cytotoxic [[Cytokines|cytokines]] (especially TNF-α & TNF-β lymphotoxin) act on TNF receptors to induce programmed cell death.
     
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