immune system

Question

Cell-mediated immunity is primarily mediated by which cells?

RankGuru · Accepted Answer

1. **Specific Immunity**: Divided into Humoral and Cell-mediated components.
2. **Humoral Immunity**: Carried out by **B-lymphocytes** which differentiate into plasma cells to secrete antibodies.
3. **Cell-mediated Immunity (CMI)**: Orchestrated by **T-lymphocytes**.
   - **Cytotoxic T cells ($T_C$)**: Directly attack and destroy virus-infected or cancerous cells.
   - **Helper T cells ($T_H$)**: Release chemicals to activate and coordinate other immune cells.
4. **Conclusion**: T-cells do not produce antibodies but act directly or through cytokines.

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immune system

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