• Decrease in CD8+ and CD4+ T cell counts were observed suggesting lymphocytopenia• Increase in IL-2, IL-6, IL-10, and IFN-γ levels in severe cases• No significant changes were observed in IL-4 and TNF-α levels• The number of T cells increased in patients who recovered from the disease, along with a decrease in the cytokine levels comparable to mild cases. The gene discussed is IFNG; the disease is lymphopenia.