Areeb Amjad, Asfar Anwar, Shujaat Ali, Farah Waseem, Hadia Khan, Mariyah Hidayat. 2023. “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 16 (11):320. https://doi.org/10.53350/pjmhs20221611320.