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प्रश्न
Explain the role of 'T' lymphocytes in providing immunity to humans.
स्पष्ट करा
उत्तर
T-lymphocytes (T-cells) produce cell-mediated immunity by targeting infected or abnormal cells. They include helper T-cells, which activate other immune cells, and cytotoxic T-cells, which kill diseased or cancerous cells.
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