Helper T-cells activate cytotoxic T cells and other helper T cells as well as activate B cells. Helper T cells are the most important cells in adaptive immunity.
Cytotoxic T cells may be defined as a type of immune cell that can destroy certain cells, including foreign cells, cancer cells, and cells contaminated with a virus.
Helper T cell not only activates the B cell but also helps in the activation of cytotoxic T cells to destroy infected target cells. Helper T cells also reform or differentiate themselves.
Therefore, Helper T-cells activate cytotoxic T cells and other helper T cells as well as activate B cells.
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