Muhammad Saqib, Talha Mahmud, Rabbia Abbas, Muhammad Ahmed 2023. Vaccination Status of Hospitalized Patients with Covid-19 Infection during 4th Wave in Tertiary Care Hospital of Pakistan. Pakistan Journal of Medical & Health Sciences. 16, 12 (Jan. 2023), 225. DOI:https://doi.org/10.53350/pjmhs20221612225.