Greetings!

Thank you for your question. In order to keep your diabetic mother away from the harms of COVID-19, follow these guidelines from the Centre of Disease Control (CDC):

• Wash your hands often with soap and water for at least 20 seconds. Use an alcohol-based hand sanitizer that contains at least 60% alcohol if soap and water are not available.
• Avoid touching your eyes, nose, and mouth with unwashed hands.
• Avoid close contact with people who are sick.
• Stay home when you are sick.
• Cover your cough or sneeze with a tissue, then throw the tissue in the trash.
• Clean and disinfect frequently touched objects and surfaces

She may consume Vitamin C for her immune system. Other than that, make sure she is compliant to her diabetic medications to get her blood sugar controlled. Advise her on eating healthy food and exercise too.

I hope this answers your question. Thank you.