There is a ton of correlational evidence of low vitamin D and C19. And it would be easy to ignore that as having cause and effect weaknesses. But we also have

There is a ton of correlational evidence of low vitamin D and C19. And it would be easy to ignore that as having cause and effect weaknesses. But we also have dozens of RCTs showing that vitamin D supplementation suppresses respiratory infections! Folks always act like we just take this study in isolation. That’s not how it should work. The totality of the evidence is quite strong for vitamin D versus C19.