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Vitamin D study #12 of 109
7/23 Analysis of outcomes based on serum levels
Lansiaux et al., Spat. Spatiotemporal Epidemiol, doi:10.1016/j.sste.2020.100362 (Peer Reviewed)
Covid-19 and vit-d: Disease mortality negatively correlates with sunlight exposure
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Analysis of COVID-19 mortality rate and sunlight exposure finding a correlation that suggests a protective effect of sunlight exposure.
In continental metropolitan France, average annual sunlight hours were found to be significantly correlated to the COVID-19 mortality rate, with a Pearson coefficient of -0.636.

Lansiaux et al., 7/23/2020, peer-reviewed, 4 authors.
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