Background The coronavirus disease‐2019 (COVID‐19) has become a worldwide health
issue with widespread hospitalization and dependence on the intensive care unit (ICU) …

Background: Contradictory evidence exists regarding the association between serum
vitamin D levels and the severity and outcomes in coronavirus 2019 (COVID-19) infected …

COVID-19 symptoms vary from asymptomatic cases to moderate and severe illness with
patients needing hospitalization and intensive care treatment. Vitamin D is associated with …

Purpose: It has been shown that low Vitamin D serum concentration is associated with
increased pneumonia and viral respiratory infections. Vitamin D is readily available …

Background and aims: Vitamin D inadequacy may be involved in the mechanisms of SARS-
CoV-2 infection and in potential risk factors for disease propagation or control of coronavirus …

Objective Preliminary findings suggest a relationship between lower serum 25-
hydroxyvitamin D [25 (OH) D] levels and incidence and severity of COVID-19. The aim of this …

Objective: This study aimed to evaluate the effect of categorized and normal vitamin D levels
on hospital stay and mortality in adult patients with COVID-19. Methods: One hundred sixty …

The aim of the study was to evaluate the vitamin D status in hospitalized COVID-19 patients
and the correlation with C reactive protein (CRP), ferritin, fibrinogen, and peripheral blood …

Background: The aim of the current study was to assess the patients with COVID-19 and the
impact of vitamin D supplementation on the course of COVID-19. Methods: This prospective …

Background: In Covid-19 infection, leukopenia, inflammation, and elevated liver enzymes
are found in most patients. Also, vitamin D deficiency attenuates the immune system and …