COVID19 is more likely to affect people with chronic conditions like Diabetes, Hypertension, Autoimmune diseases like lupus, Asthma and lifestyle determinants like Smoking, Alcoholism or IVDA. The reason behind this is the immune system seems to be impaired with such conditions and these conditions are also affected with compromised baseline function of multiple organ systems like the kidney/liver and blood vessels.
Maintaining your health status as close to normal by managing your chronic conditions and avoiding exposure to the virus is the best way to keep your risk on par with the general population and avoid falling sick.
Practice safe hygiene by following hand and face hygience and physical distancing from other potentially infected humans/pets or surfaces.
The American Diabetes Association is a great source of information and has a webpage with FAQs related to Diabetes and the Corona virus which can be found at https://www.diabetes.org/covid-19-faq