Jihan Qais Dakhal AL-lamy, Ahmed D. Jabbar. Effectiveness of the Pfazer vaccine against COVID-19 patients in chronic diseases. Eura. Med.Res. Per [Internet]. 2022 Aug. 14 [cited 2024 Nov. 15];11:17-23. Available from: https://geniusjournals.org/index.php/emrp/article/view/2037