Hamzullah Khan , Fazli Bari , Tahir Mohammad ,Rizwanullah Jan. “SARS-COV-2 Neutralizing IgG Antibodies in Patients Recovered from COVID-19 in a Hospital-Based Study: From Predictions to Reality”. Journal of Rawalpindi Medical College 25, no. 1 (August 31, 2021). Accessed January 18, 2026. https://journalrmc.com/index.php/JRMC/article/view/1503.