From the beginning of the pandemic, it was 50/50, and it still is. Half of the studies say it has an effect, the other half says it isn't significant. The only

From the beginning of the pandemic, it was 50/50, and it still is. Half of the studies say it has an effect, the other half says it isn't significant. The only thing that seems pretty much settled is that when it comes to covid (and many other things) vitamin D is useless for those who are not deficient, and taking massive doses is likely to do more harm than good. The uncertainty is whether reasonable supplementation to compensate for what is a common deficit during winter is effective or not against covid, both in term or infection and severity.