We can deal with this issue by running a randomized trial. Here's a link to a randomized trial [1] that establishes a clear causational relationship between Vit

We can deal with this issue by running a randomized trial. Here's a link to a randomized trial [1] that establishes a clear causational relationship between Vitamin D and reduced admittance into the ICU. [1] https://www.sciencedirect.com/science/article/pii/S0960076020302764?via%3Dihub#bib0100 https://www.sciencedirect.com/science/article/pii/S096007602...