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Scatter diagram of the prevalence of vitamin D deficiency (<50 nmol/L) versus COVID-19 deaths per million people, as of June 22, 2021 (r = 0.634, P = 0.003). AUT, Austria; BEL, Belgium; BGR, Bulgaria; BIH, Bosnia and Herzegovina; CHE, Switzerland; DEU, Germany; ESP, Spain; FIN, Finland; FRA, France; GBR, United Kingdom; GRC, Greece; HRV, Croatia; IRL, Ireland; ITA, Italy; NOR, Norway; PRT, Portugal; ROU, Romania; RUS, Russia; SVN, Slovenia; UKR, Ukraine.
