ESPE Yearbook of Paediatric Endocrinology

JAMA Netw Open. 2021;4(3):e214117. https://bit.ly/3zopFZ4This prospective observational cohort study (n=4638) measured vitamin D level in the year before undergoing COVID-19 testing. The risk of a positive COVID-19 test in Black, but not White, individuals was 2.64-fold higher if vitamin D level was 30–40 ng/ml compared to > 40 ng/ml.Vitamin D may improve immune functi...