Imran, Muhammad, and Rehana Yasmeen. 2021. “SARS-CoV2 Outbreak: Emergence, Transmission and Clinical Features of Human Coronaviruses”. Journal of Ayub Medical College Abbottabad 32 (4-Sup 1):710-13. https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/7774.