How does COVID-19 severity changes in people with various blood groups?

Are African Americans at a greater risk of severe COVID-19?

Blood group A is at a significantly higher risk of COVID-19 infection and severity.
Blood group O is at a significantly lower risk of COVID-19 infection and severity.

Blood type O have a lower level of vWF

Blood groups
A blood group has A antigen

Black Americans are dying at a 2.6 times higher rate than white Americans. (NY)

Chicago Black Americans make 70% of all deaths from coronavirus. While their population is only 29% of the city.

Black Americans have higher von Willebrand Factor

Vitamin D levels are low in Black Americans

Adiponectin and hypertension

Reduces adiponectin receptor function in obesity

Reduced adiponectin release in obesity leading to hypertension, atherosclerosis, CKD, metabolic syndromes, COPD, sleep apnea, etc.