“The Correlation Between ABO Blood Groups and the IFN-Γ Levels in COVID 19 Infected Patients”. American Journal of Pediatric Medicine and Health Sciences (2993-2149) 2, no. 6 (June 5, 2024): 1–7. Accessed January 27, 2026. https://www.grnjournal.us.e-scholar.org/index.php/AJPMHS/article/view/4986.