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Scatter diagram of the prevalence of severe vitamin D deficiency (<30 nmol/L) versus COVID-19 deaths per million people, as of June 22, 2021 (r = 0.538, P = 0.021). AUT, Austria; BEL, Belgium; BGR, Bulgaria; BIH, Bosnia and Herzegovina; CHE, Switzerland; DEU, Germany; FIN, Finland; FRA, France; GBR, United Kingdom; GRC, Greece; HRV, Croatia; IRL, Ireland; ITA, Italy; NOR, Norway; PRT, Portugal; ROU, Romania; SVN, Slovenia; UKR, Ukraine.
