Janjua, Sana Iqbal, Muhammad Younas, Raja Kamran Afzal, Asma Khan, Farhat Yasmeen, and Muskan Younas. “Frequency of SARS-CoV-2 Antibodies in PCR-Positive COVID-19 Patients and High-Risk Exposed Subjects at Multan”. Pakistan Armed Forces Medical Journal 73, no. 4 (August 31, 2023): 1095–1099. Accessed July 14, 2024. https://pafmj.org/PAFMJ/article/view/8820.