“Evaluation of the Immunological Efficiency for Some of COVID-19 Vaccines (Pfizer, AstraZeneca and Sinopharm) Among Vaccinated People of Wasit Province in Iraq”. Journal of Pharmaceutical Negative Results (November 7, 2022): 64–69. Accessed June 8, 2026. https://pnrjournal.com/index.php/home/article/view/2997.