Insufficient blood levels of the neurohormone vitamin D are associated with increased risk of
COVID-19 severity and mortality. Despite the global rollout of vaccinations and promising …

Background: Several studies suggest an association between serum 25-hydroxyvitamin D
(25OHD) and the outcomes of Severe Acute Respiratory Syndrome Corona-Virus-2 (SARS …

Purpose As the world continues to cautiously navigate its way through the coronavirus
disease 2019 (COVID-19) pandemic, several breakthroughs in therapies and vaccines are …

Objectives Vitamin D status in patients with COVID-19 is an on-going controversial issue.
This study aims to determine differences in the serum 25 (OH) D concentrations of Arab Gulf …

We explored the association between COVID-19 severity and vitamin D status using
information from Danish nation-wide health registers, the COVID-19 surveillance database …

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 …

Purpose Vitamin D deficiency has been reported as a key factor in the development of
infectious diseases such as respiratory tract infections and inflammatory processes like …

This systematic review was conducted to summarize and clarify the evidence on the
association between 25-hydroxyvitamin-D [25 (OH) D] concentrations and coronavirus …

Background To investigate the association between serum 25-hydroxyvitamin D levels and
its effect on adverse clinical outcomes, and parameters of immune function and mortality due …

Background The relationship between vitamin D status and COVID-19-related clinical
outcomes is controversial. Prior studies have been conducted in smaller, single-site, or …