The seasonality of infectious disease outbreaks suggests that environmental conditions
have a significant effect on disease risk. One of the major environmental factors that can …

Background: Vitamin D deficiency (VDD) has been implicated in the pathogenesis of
tuberculosis (TB), but most studies have not reported a significant association. We …

Context Vitamin D plays an important role in immune function, and the deficiency thereof has
been associated with several infections, most notably respiratory tract infections. However …

Skin cancer is a non-communicable disease that has been underexplored in Africa,
including Southern Africa. Exposure to solar ultraviolet radiation (UVR) is an important …

Background A variety of abnormalities in vitamin D metabolism have been reported in
patients with active tuberculosis. However, intervention trials have produced inconsistent …

Vitamin D deficiency (25-hydroxyvitamin D [25 (OH) D]< 50 nmol/L) is common among
adults in Cape Town, South Africa, but studies investigating vitamin D status of children in …

Tuberculosis infection caused by the contagious pathogen Mycobacterium tuberculosis
(MTB) is one of the ancient diseases in the world. The problem of drug resistance is a …

Background Age, body mass index (BMI) and pre-existing comorbidities are known risk
factors of severe coronavirus disease 2019 (COVID-19). In this study we explore the …

Vitamin D deficiency is a globally important problem, particularly in children, but there is a
lack of information regarding this deficiency in preschool children from southeastern Europe …

Introduction: Acute exacerbation of chronic obstructive pulmonary disease (AECOPD) is an
important disease of hospitalized elderly patients, who often have electrolyte imbalances …