Gly De La Glory Ginting, P. ., M. . Isabela Silalahi, and S. . Lestari Nasution. “The Effect Of Risk Factors And Clinical Symptoms On Comorbid And Non-Comorbid Disease In Covid-19 Patients At Royal Prima General Hospital Medan”. International Journal of Health and Pharmaceutical (IJHP), vol. 2, no. 2, May 2022, pp. 404-13, doi:10.51601/ijhp.v2i2.52.