IL18 and lymphopenia: Significant among them are neutrophilia, neutrophil-to-lymphocyte ratio (NLR), lymphopenia, inflammatory markers like C-reactive protein (CRP), and cytokines including interleukin-6 (IL-6), interleukin-8 (IL-8), interleukin-18 (IL-18), interferon-α (IFN-α), and tumor necrosis factor (TNF) [5-7].