Kustiawan, T.C. and Nadhiroh, S.R. 2023. Literature Review: Effect of Vitamin D Deficiency in COVID-19 Patient. Media Gizi Kesmas. 12, 2 (Nov. 2023), 1047–1051. DOI:https://doi.org/10.20473/mgk.v12i2.2023.1047-1051.