Heisnam Kulabidhu Singh, Wangkhem Jibol Singh, and Banikanta Sharma. 2021. “Mortality Characteristics of the Second Wave of Covid 19 Pandemic in a Tertiary Hospital in Manipur, India: A Retrospective Study”. International Journal of Health and Clinical Research 4 (24):53-56. https://ijhcr.com/index.php/ijhcr/article/view/3754.