Researchers from the School of Biomedical Sciences of the Faculty of Medicine at The Chinese University of Hong Kong (CU Medicine) have recently applied an advanced statistical approach to analyze risk factors that may be causally related to COVID-19 infection. Results suggested that diabetes may be a risk factor leading to increased susceptibility to or severity of COVID-19 infection through changes in ACE2 expression, which is a key receptor for the virus. A substantial proportion of COVID-19 death cases in Hong Kong suffered from diabetes. There is an urgent need to confirm risk factors and the mechanisms in order to protect the susceptible groups and identify effective treatments. The current study results were recently published in the international scientific journal Diabetes Care.