Interesting. Okay, let's play with this. Let us extrapolate from the strong correlation found by this retrospective review, and postulate that Vitamin D Insuff

Interesting. Okay, let's play with this. Let us extrapolate from the strong correlation found by this retrospective review, and postulate that Vitamin D Insufficiency (VDI) is indeed a major contributing factor in either the severity of a COVID-19 infection, or the chances of contracting it. (I am not claiming this is indeed true, correlation != causation, but I think strong correlations are certainly worth looking at and playing with). It is my observation that in my local area, the shelter-in-place order has resulted in more people spending more of their time indoors and not going outside as much. The park in my neighborhood is empty. I see less people on the bike trails visible from the roads I take to the grocery store. A nature park 20 minutes from my house, the kind that people go to to get out of the city and the hell away from other people, is closed with COVID-19 as the justification and scary signs threatening fines posted at all the entrances. And so on. With less people getting outside, and less often, that means more people are getting less sun exposure, and less vitamin D. Assuming that their diets aren't changing to make up for that, that means more people with VDI, and those already with VDI getting worse. As such, if VDI will make it easier to catch COVID, or make the symptoms worse once caught, I can't help but wonder if these shelter-in-place orders intended to slow the spread won't end up shooting us in the foot, setting us up for a 2nd wave more brutal than had people been encouraged and incentivized to get outside more. I really hope I'm wrong about that.