In patients hospitalized with COVID-19, calcifediol treatment at the time of hospitalization significantly reduced ICU admission and mortality.Nogués, Xavier and Ovejero, Diana and Quesada-Gomez, J. M. and Bouillon, Roger and Arenas, Dolores and Pascual, Julio and Villar-Garcia, Judith and Rial, Abora and Gimenez-Argente, Carme and Cos, ML. and Rodriguez-Morera, Jaime and Campodarve, Isabel and Guerri-Fernandez, Robert and Pineda-Moncusí, Marta and García-Giralt, Natalia, Calcifediol Treatment and COVID-19-Related Outcomes. Available at SSRN: https://ssrn.com/abstract=3771318 or http://dx.doi.org/10.2139/ssrn.3771318
Preprints are early stage research papers that have not been peer-reviewed. I am not a medical doctor nor a scientist and any comments I have on this topic should not be considered a peer review or medical advice.
Take Vitamin D supplements. Let the experts debate this until the end of time. See Does Vitamin D Deficiency Raise COVID-19 Risk? – JAMA. And as the debate rages, take your vitamins.