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 …

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 …

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 …

Background Evidence recommends that vitamin D might be a crucial supportive agent for
the immune system, mainly in cytokine response regulation against COVID‐19. Hence, we …

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 …

OBJECTIVE: Post-COVID-19 syndrome appears to be a multi-organ illness with a broad
spectrum of manifestations, occurring after even mild acute illness. Limited data currently …

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 …

Objectives Extensive evidence links low vitamin D status and comorbidities with coronavirus
disease 2019 (COVID-19) outcomes, but the results of published studies are contradictory …

Objective The relationship between 25-hydroxyvitamin D3 (25 (OH) D), the surrogate marker
for vitamin D3, serum concentration and COVID-19 has come to the forefront as a potential …