Abstract: The steroid hormone vitamin D has roles in immunomodulation and bone health. Insufficiency is associated with susceptibility to respiratory infections. We report 25-hydroxy vitamin D (25(OH)D) measurements in hospitalised people with COVID-19 and influenza A and in survivors of critical illness to test the hypotheses that vitamin D insufficiency scales with illness severity and persists in survivors.Cross-sectional study.Plasma was obtained from 295 hospitalised people with COVID-19 (International Severe Acute Respiratory and emerging Infection...
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Topics: 
Internal medicine
Pediatrics