Waseem Iqbal, Ikram Ullah, Uroosa Irum, Saima Siddiqi, & Khalid Mahmood Khan. (2023). An Estimate of Protective Immunity against SARS-CoV2: Comparison of Different Vaccine Types. Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences, 60(3), 377–382. https://doi.org/10.53560/PPASB(60-3)749