“to evaluate the association between supplementation rather than serum levels and outcome.”
Interesting.
Seen a study that compared Nitric Oxide levels to D levels and showed a high level of reduced covid infection caused by the NO levels- which were subject to the D levels.
Apparently organ damage from Covid can be a result of cytokine storm, which I believe is the same as the "hyperactivation of macrophages" mentioned in the nih paper on Vitamin D.
It will be sad if Vitamin D given to help his immune system instead caused a cytokine storm. Just a guess on my part. There's a lot that still isn't known about the way that this disease behaves.
"increased ACE2 expression may result in enhanced viral homing and organ damage, as well as in an aberrant innate immune response with hyperactivation of macrophages"