Low vitamin D levels make your immune system less efficient. Darker skin requires more time in the sun to make vitamin D, especially at northern latitudes, when there are times of year the UV rays are such that you don't make vitamin D at all. Many of us have lifestyles that keep us indoors much of the time. This lack of sun exposure will affect those with darker skin more. Thus, they will be more susceptible to illnesses, including COVID-19. The sun is racist.
Low vitamin D levels make your immune system less efficient. Darker skin requires more time in the sun to make vitamin D, especially at northern latitudes, when there are times of year the UV rays are such that you don't make vitamin D at all. Many of us have lifestyles that keep us indoors much of the time. This lack of sun exposure will affect those with darker skin more. Thus, they will be more susceptible to illnesses, including COVID-19. The sun is racist.