The unexpected spectacular 2020 October COVID-19 boost in European countries correlated with the latitude, but not with the temperature [article]

Stephan Walrand
2020 medRxiv   pre-print
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
more » ... latitudes, this is an additional observation supporting the impact of low vitamin blood D level on the respiratory impairment in COVID-19 disease.
doi:10.1101/2020.10.28.20221176 fatcat:7aqdaxjwkrgudoyqqueyskjgwi