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==TH<sub>1</sub> Cells==
==TH<sub>1</sub> Cells==
*TH1 cells help macrophages digest bacteria (''organisms in vesicles'')
* TH<sub>1</sub> cells secrete a range of cytokines.
* TH<sub>1</sub> cells secrete a range of cytokines.
* Cytokines secreted include:
* Cytokines secreted include:
==TH<sub>2</sub> Cells==
==TH<sub>2</sub> Cells==
*TH2 cells help [[Lymphocytes - WikiBlood#B cells|B cell]] produce antibody (''organism in tissue fluid'')
* The TH2 population influences [[Lymphocytes - WikiBlood#B cells|B cell]] activation, proliferation and immunoglobulin production.
* The TH2 population influences [[Lymphocytes - WikiBlood#B cells|B cell]] activation, proliferation and immunoglobulin production.
* The TH2 [[Lymphocytes - WikiBlood#T cells|T cell]] population secrete a range of cytokines.
* The TH2 [[Lymphocytes - WikiBlood#T cells|T cell]] population secrete a range of cytokines.
==Cytotoxic T-Cells==
==Cytotoxic T-Cells==
*Cytotoxic T cells kill virus infected cells (''organisms in cytoplasm'')
* Viruses are intracellular pathogens that use the host cell machinery for pathogen protein synthesis.
* Viruses are intracellular pathogens that use the host cell machinery for pathogen protein synthesis.
** Viral peptides associate with MHC class I and are expressed on the cell surface.
** Viral peptides associate with MHC class I and are expressed on the cell surface.