Eva Hiikmatul Damayanti, Budyono C. Literature Review: Effect of Vitamin C, Vitamin D, and Zinc on COVID-19. JKU [Internet]. 2022 Jan. 22 [cited 2024 Nov. 23];10(4):694-702. Available from: https://jku.unram.ac.id/index.php/jk/article/view/597