Introduction Vitamin D status is related to risks of influenza and respiratory tract infections.
Vitamin D has direct antiviral effects primarily against enveloped viruses, and coronavirus is …

The outbreak of COVID-19 has created a global public health crisis. Little is known about the
protective factors of this infection. Therefore, preventive health measures that can reduce the …

Background: Coronavirus disease (COVID-19) is a respiratory and systemic disorder caused
by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) or novel Coronavirus …

OBJECTIVES Although vaccination has started, coronavirus disease 2019 (COVID-19)
poses a continuing threat to public health. Therefore, in addition to vaccination, the use of …

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: Coronavirus disease 2019 (COVID-19) is a disease primarily affecting the
respiratory tract, however due to the nature of the pathogenesis it is able to affect the whole …

Vitamin D modulates the systemic inflammatory response through interaction with immune
system. As such, it has a possible protective role against the risk of respiratory tract …

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 …

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 …

Results: The 28 studies summarized in this review provide observational findings that
vitamin D levels are related to the incidence, severity, and mortality rate of COVID-19 …