European COVID-19 2nd wave start dates were associated with latitude (vitamin D), not temperature

The unexpected spectacular 2020 October COVID-19 boost in European countries correlated with the latitude, but not with the temperature preprint Oct 31

View ORCID ProfileStephan Walrand

doi: https://doi.org/10.1101/2020.10.28.20221176

Re-start date not associated with temperature, but was associated with latitude

* COVID-19 mortality rate highest North of 35 degrees latitude (Vitamin D) – April 20, 2020 * Less COVID-19 at high altitude due to more Vitamin D or other possible reasons – July 2020 Multiple Sclerosis incidence is still associated with latitude – Nov 2019 1. # VitaminDWiki Items in both categories UV and Virus are listed here: {category}

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Many European countries underwent an unexpected spectacular boost of the daily reported new COVID-19 cases between September 20th and October 18th, imposing in emergency new confinement rules in order to prevent hospitals saturation. The present study shows no correlation between the country COVID-19 boost date and its 2 weeks preceding temperature, but shows an impressive correlation with the country latitude. As the daily UV insolation earlier decreases in autumn for higher latitudes, this is an additional observation supporting the impact of low vitamin blood D level on the respiratory impairment in COVID-19 disease.

Restart date for each country