UJJAN, I. D. Covid-19: Factors for Global Variations in Disease Severity and Mortality. Journal of Liaquat University of Medical & Health Sciences, [S. l.], v. 19, n. 03, p. 150–151, 2020. Disponível em: http://ojs.lumhs.edu.pk/index.php/jlumhs/article/view/389. Acesso em: 17 may. 2024.