Mendelian randomization helps to tease out causality, and there does not seem to be a causal link between Vitamin D level and COVID-19.Click here to subscribe:Get more medical news analysis at or calcitriolcholecalciferolCoronaviruscoronavirus newscoronavirus updateCOVID-19COVID19Critical ThinkingDatadoctorepidemiologyergocalciferolhealthimmune systemIMMUNITYMDmedicinemethods mannewsperry wilsonphysicianPREVENTresearchresearchersciencescientiststatisticssupplementsvideoVITAMINvitamin COVID-19Vitamin Dvitamin d and coronavirusvitamin d and covidVitamin D and COVID-19vitamin d benefitsvitamin d deficiencyvitamin d deficiency symptomsvitamin d supplementsvitamin d3vitamins to prevent COVIDvlogYaleYouTubeRelated Posts Did Your Allergies Get Worse After COVID? Watch This February 26, 2026 There may be a universal vaccine in the future. #science #vaccine #doctor February 21, 2026 The Immune Shift No One Explains After COVID February 19, 2026 Doctor Reacts: Covid masks in 2026?! February 19, 2026 ‘Particularly capricious’: Doctor weighs in on undermining of mRNA technology February 15, 2026 COVID’s Hidden Impact: Immune System Triggers Explained #shorts January 30, 2026