Areeb Amjad, Asfar Anwar, Shujaat Ali, Farah Waseem, Hadia Khan, Mariyah Hidayat. The Challenges for Implementation of Policies Causing A Delay in Mass Immunization Against Covid-19: A Cross Sectional Qualitative Study. Pakistan Journal of Medical & Health Sciences [Internet]. 2023 Jan. 3 [cited 2024 Dec. 22];16(11):320. Available from: https://pjmhsonline.com/index.php/pjmhs/article/view/3396