Pathology General 139b56c6 All of the following are pyrogenic cytokines, Except- A Interleuken 18 (IL-18) B Interleuken 6 (IL-6) C Tumor Necrosis Factor (TNF) D Interferon a (IFN-a) High-Yield Explanation Ans. is 'a' i.e., Interleukin 18 (IL-18) Interleukin 18 is not a pyrogenic cytokine.