IFNγ is secreted by innate-like lymphocytes, including group 1 innate lymphoid cells (ILC1s), and by adaptive lymphocytes, including T helper 1 (TH1) cells and cytotoxic T lymphocytes (CTLs), in response to cytokine and antigen stimulation. It plays important roles in tissue homeostasis, immune and inflammatory responses and tumour immunosurveillance. Anti-IFNγ antibody, is a monoclonal antibody used to detected IFNγ, which is a recombinant IgG1 kappa, humanized monoclonal antibody that selectively binds with Human IFN-gamma protein.