There's a lot more to this author that the average poster. Deva Boone was commenting in this thread [1], she's a doctor. Seems sensible and makes interesting points. She was posting under https://news.ycombinator.com/user?id=devaboone. Just posting this because there's always kind of wacky things said about the miracle of vitamin D and I was interested in what an actual doc has to say (as opposed to us programmers ;-)).

1. https://news.ycombinator.com/item?id=24061164 Vitamin D and covid-19 mortality.