M. B. Habib, N. A. Shah, A. Amir, N. Safdar, G. Batool, and F. Afzal, “Prevalence of Symptomatic and Asymptomatic Trends of COVID-19 and their Aggressiveness among Various Gender and Age Groups Due to Smoking”, BioSci Rev., vol. 5, no. 1, pp. 10-20, Jun. 2023.