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A comment on Vitamin D insufficiency may account for almost 90% of Covid-19 deaths. Parent comment
As TFA says, it "may" account for it. Or may not. You need a control group with D (but no other) deficiency to upgrade from "may" to "does".
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As TFA says, it "may" account for it. Or may not. You need a control group with D (but no other) deficiency to upgrade from "may" to "does".