Analysis of the association between vitamin D and viral infections and risk factors related to Covid-19. Research, Society and Development, [S. l.], v. 9, n. 8, p. e91985161, 2020. DOI: 10.33448/rsd-v9i8.5161. Disponível em: https://www.rsdjournal.org/rsd/article/view/5161. Acesso em: 4 feb. 2026.