Editor's Comment. Caution: The Intersection of Diabetes and COVID-19.

Even from the earliest days of the COVID-19 pandemic there was little doubt that diabetes was playing a significant role in the clinical course of these cases. Riahi et al. in their paper “Insulin use, diabetes control, and outcomes in patients with COVID-19” (1) add important insight into the evolving understanding of the interaction between diabetes and COVID-19 infection. This is a single-center retrospective observational study conducted in adults. It examines the impact of glycemic control and insulin requirements on the outcomes of patients with preexisting diabetes admitted with confirmed COVID-19 infection. This study population is of particular interest because it is a predominantly African American and Hispanic population with a significant incidence of comorbidities. The principal findings of this study were: