Since cv inhibits the red blood cell from carrying or delivering oxygen it would be expected to see it in areas that traditionally have poor circulation like tips of fingers and toes. This is the same as you see with vascular damage from uncontrolled diabetes.
I would add that if a person exhibited the symptoms from cv, they might want to check a1c levels and general blood sugar levels. I have known quite a few people who discovered they were diabetic when their blood sugar got so high that they were experiencing diabetic keto acidosis symptoms. That didn’t happen overnight. By then you may well have significant vascular damage.
I’ve read the bone marrow produces more blood cells to replace those whose heme has been destroyed.
High hemoglobin levels and ferritin levels are another sign of the virus.