“Evaluating the Effectiveness of Pfizer, AstraZeneca, and Sinopharm Vaccines Against COVID-19 in Iraq: A Cross-Sectional Study of Vaccine Efficacy and Symptom Severity” (2024) Journal of Madenat Alelem, 16(1), pp. 11–21. Available at: https://journal.mauc.edu.iq/index.php/JMAUC/article/view/507 (Accessed: 5 May 2026).