What Stimulates Cytotoxic T Cells?

What Stimulates Cytotoxic T Cells? Antigen presentation stimulates T cells to become either “cytotoxic” CD8+ cells or “helper” CD4+ cells. What is the role of helper T cells versus cytotoxic T cells? As the names suggest helper T cells ‘help’ other cells of the immune system, whilst cytotoxic T cells kill virally infected cells and