Hajra Farooq, Omar Rasheed Chughtai, Hijab Batool, Waheed uz Zaman Tariq, and Akhtar Sohail Chughtai. “Comparison of Covid-19 IgG Anti-Spike Antibody Titer After Vaccination With Sputnik V in Seropositive and Naïve Vaccinees”. Proceedings 35, no. 4 (November 8, 2021): 1–5. Accessed April 16, 2024. https://proceedings-szmc.org.pk/index.php/szmc/article/view/177.