Nahar Sultana, G. N. ., A. Das, K. . Akhtaar, C. F. . Hossain, and M. A. . Islam. “STUDY OF COVID-19 CASE WITH MULTIPLE COMORBIDITIES: SEVERE TO SURVIVAL”. Bioresearch Communications, vol. 9, no. 1, Dec. 2022, pp. 1177-9, doi:10.3329/brc.v9i1.63597.