Background Vitamin-D deficiency is linked to a wide range of chronic and infectious
diseases. Body of literature suggested that the prevalence of this deficiency can have …

African Americans have higher incidence of, and mortality from, many health-related
problems than European Americans. They also have a 15 to 20-fold higher prevalence of …

Background The contribution of vitamin D to thyroid disorders has received paramount
attention; however, results are mixed. Hence, we designed a systematic review and meta …

Supplemental vitamin D can reduce the risk and mortality of viral pneumonia. The
relationship between 25 hydroxyvitamin D [25 (OH) D] levels and the severity and mortality …

Objective Recent studies have shown a possible association between vitamin D deficiency
and the severity of primary dysmenorrhea. The present study aimed to investigate the effect …

Abstract Coronavirus disease 2019 (COVID‐19) is an infectious disease caused by the
severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2), but the pathogenesis is …

Background Vitamin D deficiency during pregnancy is a public health problem in Pakistan
and is prevalent among most women of reproductive age in the country. Vitamin D …

Introduction Despite the high prevalence of hypocalcemia in patients with COVID-19, very
limited studies have been designed to evaluate etiologies of this disorder. This study was …

Background Tuberculosis remains a global threat and a public health problem that has
eluded attempts to eradicate it. Low vitamin D levels have been identified as a risk factor for …

Objectives The role of vitamin D deficiency has been linked with recurrent upper respiratory
tract infections, but its impact on the frequency of tonsillitis is not yet fully understood. The …