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86-0.98; p = 0.016), but not after adjustment for confounders (mortality per 10nmol/L 25(OH)D HR 0.98; 95% CI = 0.91-1.06; p = 0.696). Vitamin D insufficiency or deficiency was also not independently associated with either COVID-19 infection or linked mortality. Our findings do not support a potential link between 25(OH)D concentrations and risk of severe COVID-19 infection and mortality. Randomised trials are needed to prove a beneficial role for vitamin D in the prevention of severe COVID-19 reactions or death. Our findings do not sup