Shahid, Afshan, Shaza Shahid, Muhammad Ashraf, and Khawwar Saeed. “Contact Tracing Along With Epidemiological and Clinical Characteristics of Novel Corona Virus 2019 in Prisoners of Camp Jail, Lahore – A prospective Case Ascertaining Study”. Pakistan Journal of Medical Sciences 38, no. 3 (January 25, 2022). Accessed May 25, 2024. https://pjms.org.pk/index.php/pjms/article/view/4753.