IFNA7 (interferon alpha 7) is a type I interferon that functions as a cytokine with antiviral and immunomodulatory properties. The protein exhibits type I interferon receptor binding activity and plays a crucial role in antiviral defense responses 1. IFNA7 expression is significantly upregulated during viral infections, including SARS-CoV-2 and henipavirus infections, where it mediates cellular antiviral responses through the type I interferon signaling pathway 12. The gene is involved in immune cell activation, including B cell, T cell, and natural killer cell activation, contributing to both adaptive and humoral immune responses 3. IFNA7 expression can be induced by extracellular vesicles from cancer cells, suggesting involvement in tumor-associated immune signaling 3. Genetic variants in IFNA7 have been associated with disease susceptibility, including melanoma risk through chr9 interaction mapping and colorectal cancer prognosis 45. In lupus nephritis, tubulointerstitial IFNA5 expression correlates with proteinuria, indicating potential relevance for autoimmune kidney disease 6. The gene is also utilized in prognostic models for lung adenocarcinoma, where IFNA7-containing gene pairs help stratify patient risk 7.