Study of the Relationship between Vitamin D Level and the Increase in the Severity of Covid-19 Infection in Kirkuk City. Medico Legal Update, [S. l.], v. 21, n. 2, p. 1383–1387, 2021. DOI: 10.37506/mlu.v21i2.2884. Disponível em: https://ijop.net/index.php/mlu/article/view/2884. Acesso em: 20 may. 2026.