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This article was initially categorized based on scheme outlined at WP:DERM:CAT. kilbad ( talk) 23:22, 20 February 2009 (UTC) reply

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3321262/

Old or overweight people often have Vitamin K deficiency, and they also have higher death rates due to COVID. Preliminary studies have found correlance between K-def and COVID : August 2020 and December, but causality has not been demonstrated - yet?. TGCP ( talk) 20:32, 4 January 2021 (UTC) reply