There is this response by scientists/doctors regarding vitamin d www.bmj.com/content/369/bmj.m1548/rr-6
" Is ethnicity linked to incidence or outcomes of covid-19?
BMJ 2020; 369 doi: doi.org/10.1136/bmj.m1548 (Published 20 April 2020)
Cite this as: BMJ 2020;369:m1548
Rapid Response:
COVID-19 ’ICU’ risk – 20-fold greater in the Vitamin D Deficient. BAME, African Americans, the Older, Institutionalised and Obese, are at greatest risk. Sun and ‘D’-supplementation – Game-changers? Research urgently required.
Dear Editor
COVID-19 (Coronavirus) mortality disproportionately impacts BAME (Black, Asian and Minority Ethnic) UK individuals, African Americans, Swedish Somalis,[1] and the institutionalised; particularly care-home residents. COVID-19 severity and mortality, appear related to vitamin D deficiency, [2 -12] helping explain higher COVID-19 mortality rates in BAME and the obese.[13]
Obesity is a strong COVID-19 risk factor, as are co-morbidities, including diabetes, cardio-vascular disease; and sedentary lifestyle; all are dependent on mitochondrial functionality (Gnaiger).[14] Fat cells accrete vitamin D.[15] The obese consistently have proportionately lower vitamin D status (serum 25-hydroxyvitamin D [25(OH)D]).[16]
Vitamin D is a secosteroid hormone with various skeletal and non-skeletal effects including regulation of innate and adaptive immune responses. Vitamin D, by binding to the vitamin D response element in various gene-promoter-regions, decreases expression of pro-inflammatory-cytokines and increases production of antiviral and antibacterial[17] proteins, suggesting an important role in antiviral innate adaptive immunity.[18] Importantly, vitamin D is also involved in renin–angiotensin system regulation,[19] which is regulated by entry of the SARS-Cov-2 virus into cells via the ACE2 receptor, leading to cytokine storms, with subsequent fatal respiratory distress syndrome"