IFNG and pulmonary tuberculosis: In the current study, the gamma-interferon level was normal (<0.58 μg/ml) in the serum of one of the majority of patients with pulmonary tuberculosis, unlike those co-infected with SARS-COV-2 who had a high gamma-interferon level (>0.58 μg/ml), thus corroborating the antiviral role of this cytokine.