For the vitamin d deniers who won't bother to watch the video or read the article, here's some more about why NICE was so very wrong (from the article link above).
Will this study influence NICE and the Vitamin D deniers?
September 3rd 2020 saw the release of the results of a randomised controlled clinical trial (RCT) of calcifediol, from Córdoba, Spain. Of 75 patients admitted to hospital with Covid-19 pneumonia, 25 received standard care. Of these 13 (50% needed transfer to the ICU, and 2 (8%) died. 50 were randomised to receive calcifediol (part-activated vitamin D) in addition to standard care. Of these just one (2%) required transfer to the ICU and he survived.
This dramatic benefit was effective, cheap, safe, and readily available. It was just what was needed when deaths from Covid-19 were expected to increase with the end of the summer having been reached. But the benefit was ignored and calcifediol was not accepted as a treatment by doctors who were treating the seriously ill. Desperate times need desperate measures, but this did not include proven and safe calcifediol for reasons that to me were incomprehensible. Vitamin D denial is not rational as it ignores vast evidence of the extent of vitamin D deficiency, its great disadvantage during the pandemic, and the demonstrated benefit of correction of the deficiency.
The UK National Institute for Clinical and Care Excellence (NICE) stated that clinical practice should not be influenced by the result of the Córdoba study, despite its obvious great advantage. This was a centralisation of clinical decision-making previously unknown. In the early summer NICE had deferred a decision concerning the clinical use of vitamin D in the Covid-19 pandemic until it had seen evidence from an RCT. This was absurd as a widespread vitamin / hormone deficiency was clear, and correction of deficiency should have been obvious good clinical practice without the necessity of approval by NICE.
When the result of the Córdoba RCT appeared, NICE still stated that there was not enough evidence to recommend vitamin D for use in Covid-19, and it deferred approval once again, until the publication of another RCT.
The big question is WHY is NICE, and other medical institutions worldwide, denying the efficacy of vitamin D, a supplement which is effective, cheap, safe, and readily available? It's a really good question.
I repeat from the above extract: But the benefit was ignored and calcifediol was not accepted as a treatment by doctors who were treating the seriously ill.
The deaths that followed are on their hands.
My own answer: Follow The Money.
Conclusion
It is beyond reasonable doubt that vitamin D deficiency is not just common but is particularly common in those seriously ill with Covid-19, and that vitamin D replacement therapy has a vital role to play in minimising deaths during the present pandemic.
It is no longer acceptable for people to die from Covid-19 when deficient in vitamin D.
It is no longer acceptable for vitamin D (ideally in the form of calcifediol) to be withheld from people admitted to hospital severely ill with Covid-19 who are at risk of escalation to ICU and possible death.
(Sorry for once again injecting a normal thread with vitamin d info. This is the third time, and I've already been told off once. I do hope that one or two people reading this thread take it seriously enough to forgive me.)