Sehar Khaliq , Kiran Fatima Farooq , Wajid Hussain ,Sami Saeed. “Absolute Lymphocyte Count and Its Correlation With Serum Ferritin Level: An Early Indicator of Disease Severity in COVID-19”. Journal of Rawalpindi Medical College 25, no. 1 (August 31, 2021). Accessed January 18, 2026. https://journalrmc.com/index.php/JRMC/article/view/1635.