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 …

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 …

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 …

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 …

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 Vitamin D deficiency has been linked to the increased severity of numerous
viral infections. Objective To assess whether vitamin D supplementation is safe and effective …

Vitamin D deficiency co-exists in patients with COVID-19. At this time, dark skin color,
increased age, the presence of pre-existing illnesses and vitamin D deficiency are features …

COVID-19, the acute respiratory tract infection (RTI) caused by the Coronavirus, Sars-CoV-2,
has swept around the world. No country has been spared from its onslaught. Treatments that …

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 …

There is still limited evidence regarding the influence of vitamin D in people with COVID-19.
In this systematic review and meta-analysis, we analyze the association between vitamin D …