Pathology Impoant step in activation of naive CD 4+ T cells and initiation of cell mediated immune response is played by Interleukin? A 1 B 2 C 3 D 4 💡 Explanation Impoant step in activation of naive CD 4+ T cells and initiation of cell mediated immune response is played by Interleukin? ✓ Correct Answer: B. 2