> maybe the argument you're making is that these populations with lower Vitamin D were already sick and thus more prone to COVID-19? No, he's making an observa

> maybe the argument you're making is that these populations with lower Vitamin D were already sick and thus more prone to COVID-19? No, he's making an observation unrelated to covid. At any time you're sick your vitamin D production stops so you're deficient and then on top of that you don't feel good enough to go outside so your further deprived of vitamin D.