ULLAH, Md. Anayet. Challenges of COVID‑19 Vaccine Development & Vaccination. Barind Medical College Journal, [S. l.], v. 8, n. 2, p. 1–3, 2022. DOI: 10.70818/bmcj.2022.v08i02.0126. Disponível em: https://bmcj.org/index.php/bmcj/article/view/126. Acesso em: 9 jul. 2025.