Hassan, Taimoor. “A Global Update on COVID-19 Pandemic: A Global Update on COVID-19 Pandemic”. Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences 58, no. 4 (December 11, 2021): 1–4. Accessed February 2, 2026. http://www.ppaspk.org/index.php/PPAS-B/article/view/626.