I didn't see it in the article, did they measure vitamin D levels in the general... | Hacker News

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josefresco on Oct 27, 2020 | parent | context | favorite | on: Over 80% of Covid-19 patients in a hospital study ...

I didn't see it in the article, did they measure vitamin D levels in the general public or is that in another study?

joshgel on Oct 28, 2020 [–]

This was a retrospective study. Meaning the 'general population' they drew from were people with vitamin D tests during the period (Jan-Mar 2020) already drawn for some reason.

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