Majed, S.O. 2023. Comparison of Antibody Levels Produced by Pfizer, AstraZeneca, and Sinopharm Vaccination in COVID-19 Patients in Erbil City-Iraq: Immune Response Against Vaccination in COVID-19 Patients. Cellular and Molecular Biology. 69, 3 (Mar. 2023), 103–112. DOI:https://doi.org/10.14715/cmb/2023.69.3.14.