This is a good point to bring up -- but it was actually proven not to cause Vitamin D deficiency: http://agingbiotech.info/vitamindcovid19/ http://agingbiotech.

This is a good point to bring up -- but it was actually proven not to cause Vitamin D deficiency: http://agingbiotech.info/vitamindcovid19/ http://agingbiotech.info/vitamindcovid19/ > Of note, the hospitals tested D levels repeatedly and also had pre-admission levels. The author performed an analysis to determine whether the levels changed much within a patient and found that they did not for 95% of the overall cases examined, which then made up the 212 cases kept for analysis. The vitamin D levels used were pre-admission. Thus, though the data are associative, the reverse causality that the infection caused dropping D levels can be ruled out.