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A comment on Factors associated with Covid-19 deaths in records of 17M adult NHS patients. Parent comment

Re:Factors associated with Covid-19 deaths in records of 17M... by whiddershins on Monday May 18, 2020 @03:10PM (#23227056)
Yes, but vitamin D production relates to direct sunlight ... I think the angle of the sun and amount of atmosphere it has to go through affects UV amounts so a warmer European country does have less direct sun therefor more potential for vitamin D deficiency ...

TBH I am not super solid on every one of these details.

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Re:Factors associated with Covid-19 deaths in records of 17M... by spiralx on Monday May 18, 2020 @04:30PM (#23227979)
That's a good point, but this paper seems to indicate that the amount of sunlight required over the summer in order to build enough vitamin D to last over winter isn't much for white Caucasians in the UK - nine minutes each day at lunchtime between March and September, assuming shorts and t-shirts are worn during the summer:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5946282/

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