Isr Med Assoc J
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Risk factors for severe coronavirus disease-2019 (COVID-19) infection include old age, chronic illness, and neurological conditions. In contrast, high vitamin D levels are known to augment immune activity and to reduce the severity of viral infections. Recently, a possible association between the likelihood of COVID-19 infection, COVID-19 severity, and vitamin D blood levels was reported. ⋯ Pre-existing vitamin D supplementation may reinforce immunity and reduce COVID-19 severity in elderly psychiatric inpatients.