People need to check their hemoglobin A1c and get it under control. Low carb and no sugars will do that very quickly.
Glycated hemoglobin
The ketogenic mouse models indicated resistance to coronavirus and/or mild symptoms.
46.2% of Americans are pre-diabetic, obese or suffer from type 2. One third of elderly suffer from thin outside and fat inside (TOFI) and are pre-diabetic (they are diabetic) with elevated HbA1c.
When people ignore negative outcomes from COVID-19 because of underlying medical conditions, they better look in the mirror. The standard American diet (SAD) has condemned the US to a bad disease course.