The median age of the patients with diabetes was 64.0 (IQR, 56.0–72.0) years. The patients with and without diabetes were well matched for age and sex, with men and women represented approximately equally. More patients with diabetes reported no exposure history but had a higher prevalence of hypertension (56.9% vs. 28.8%), cardiovascular disease (20.9% vs. 11.1%), and cerebrovascular disease (7.8% vs. 1.3%). Fever and cough were the most common onset of symptoms in both groups. Patients with diabetes were more likely to require intensive care unit (ICU) admission (17.6% vs. 7.8%, P , 0.05).