The novel Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory
syndrome coronavirus type 2 (SARS-CoV-2) is a global health concern. Vitamin D (VITD) …

Infection with the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) poses an
enormous challenge to health care systems throughout the world. Without causal treatment …

Structured abstract Importance Vitamin D deficiency increases the incidence of respiratory
virus infections. More than 1 billion people worldwide are vitamin D deficient. If vitamin D …

Purpose Low vitamin D in COVID-19 have been related to worse outcomes. However, most
of the studies conducted so far were not-controlled and retrospective, including biases …

Background Observational studies suggest that the risk and clinical prognosis of coronavirus
disease 2019 (COVID-19) are related to low vitamin D status; however, the data are …

Background As an immune modulator, vitamin D has been implicated in the coronavirus
disease‐2019 (COVID‐19) outcome. We aim to systematically explore the association of …

Coronavirus Disease 2019 (COVID-19) pandemic remains a major public health threat in
most countries. The causative severe acute respiratory syndrome coronavirus 2 (SARS-CoV …

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 …

Objective The 2019 coronavirus disease (COVID-19) pandemic has disproportionally
affected a variety of patients with underlying risk factors such as respiratory and …

Background We sought to evaluate the association between vitamin D deficiency and the
severity of coronavirus disease 2019 (COVID‐19) infection. Methods Multiple databases …