Vitamin D and Viral Respiratory Tract Infections – Not Exactly a Panacea

Over the past couple of weeks, vitamin D supplementation has been looked at as a potential therapy for COVID-19. Basic science data suggests that vitamin D has an immunomodulatory effects, such as upregulation of oxidative burst in activated macrophages in tuberculosis, or modulation of cytokine profiles that limits excessive production of pro-inflammatory cytokines in viral

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