Relationship between vitamin D level and clinical status in COVID-19 patients

Objective: Vitamin D plays an important role in maintaining the integrity of mucosal barriers and in natural and acquired immunity. In the COVID-19 pandemic, the strength of personal immunity is very important in the severe or lightening of the disease, even if there are variants of the virus or if you are vaccinated. 
Methods: In this study, we investigated the relationship between the clinical course and vitamin D levels of outpatient and inpatient follow-up patients admitted to our hospital due to COVID-19. A total of 94 patients, 47 outpatients and 47 inpatients, were included in the study. 
Result: The mean age and gender distributions of both groups were similar. Vitamin D levels were found to be normal in only 7 of 94 patients who were followed up in our hospital due to COVID-19. Patients with vitamin D levels ≥30 were significantly lower than those with "