Introduction Vitamin D levels have been reported to be associated with COVID-19
susceptibility, severity, and mortality events. We performed a meta-analysis of randomized …

Obesity is associated with an increase in morbidity and mortality from coronavirus disease
2019 (COVID-19). The risk is related to the cytokine storm, a major contributor to multiorgan …

Main cause of severe illness and death in COVID-19 patients appears to be an excessive
but ineffectual inflammatory immune response that may cause severe acute respiratory …

The prevalence of vitamin D deficiency varied among populations and regions worldwide.
Additionally, the association between vitamin D deficiency and health outcomes remained …

Background: COVID-19 disease is a serious global health problem. Few treatments have
been shown to reduce mortality and accelerate time to recovery. The aim of this study was to …

Background There is controversy regarding the association between hypovitaminosis D and
COVID-19 outcomes. Aim of the study We assessed the association between 25 …

Climate change, environmental pollution, and virus epidemics have sharply increased the
number of patients suffering from respiratory diseases in recent years. Prolonged periods of …

Background and aims Despite reports on the impact of vitamin D status on coronavirus
disease 2019 (COVID-19) severity, the association between low vitamin D status and severe …

This data-based cohort consisted of 26,508 (7%) United States veterans out of the 399,290
who tested positive for SARS-CoV-2 from 1 March to 10 September 2020. We aimed to …

Vitamin D is among the increasingly consumed dietary supplements during the COVID-19
pandemic. It plays a regulatory role in the immune system and moderates the renin …