Recently, results from a study in Israel at the Galilee Medical Center have been published correlating serum 25(OH)D levels before infection with severity of COVID-19 in the patient. In fact, a preprint of this study was available since June of 2021. As with an earlier study, which the authors reference, this study looked at serum levels taken before any infection occurred, to answer the question whether low vitamin D levels lead to severe COVID, or if the infection is causing the levels to decline. The