T Cells Helper T Cells (CD4,TH) 。TH1 Activate cells related to cell-mediated immunity TH2 Activate B cells to produce eosinophils,IgM, and IgE Cytotoxic T Cells (CD8,Tc) Destroy target cells with perforin• Helper T Cells (CD4, TH) • TH1 Activate cells related to cell-mediated immunity • TH2 Activate B cells to produce eosinophils, IgM, and IgE • Cytotoxic T Cells (CD8, TC) • Destroy target cells with perforin T Cells