Shoaib M, Waheed A, Wajid M, Urwa H, Khan T, Khan MS, Aslam MW, Ahmad S, Jafar K, Akmal H, Mahmood MI, Shamim S. COVID-19 vaccine: Potential candidates, achievements, and challenges. GSC Biol. Pharm. Sci. [Internet]. 2021Jun.30 [cited 2024Jul.23];15(3):102-9. Available from: https://gsconlinepress.com/journals/index.php/gscbps/article/view/gscbps-2021-0145