An observational study, so not definitive; but it’s in line with other research on the importance of Vitamin D as an essential immunity-booster.
This problem is especially acute among people of color; and, whomever it affects, the CDC/WHO/Dr. Fauci would have been stressing this from the beginning, if they were more interested in public health than in enabling the Great Reset.
Study link:
https://www.mdpi.com/2072-6643/12/12/3642/