ABSTRACT
OBJECTIVE: The aim: To investigate the causes of the negative impact of diabetes mellitus co-morbidity on the onset and development of COVID-19 in diabetic patients. PATIENTS AND METHODS: Materials and methods: Electronic databases of MEDLINE and Google Scholar were searched using keyword searches. CONCLUSION: Conclusions: 1. Diabetes mellitus is not a verdict. Diabetic patients can have COVID-19 with the same frequency as other people. And diabetes mellitus co-morbidity does not increase the probability of development COVID-19. 2. Previous diabetes can contribute the complications of COVID-19, patient's severe condition and can increase the mortality. 3. The reasons for the negative results of COVID 19 treatment in patients with diabetes may be: features of autonomic innervation in patients with diabetes, impaired function of pancreatic islet cells due to the influence of SARS-CoV-2, use of some cardiac drugs, expression of inflammatory factors due to infection.