I really can't imagine a bigger lying fuck than GWB...
so not only have many studies found Vitamin D levels correlate with severe Covid illness..
there are also studies which show sufficient vitamin D levels may even prevent infection.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7973108/
The Impact of Vitamin D Level on COVID-19 Infection: Systematic Review and Meta-Analysis
In the present review, we observed a significant association between a low level of Vitamin D and the risk of acquiring COVID infection, which is supported by previous studies that revealed vitamin D has protective effects against acute respiratory infections (
13). Moreover, a meta-analysis of randomized controlled trials showed that improving vitamin D status has been associated with a reduced risk of upper or lower respiratory tract infections (
13). The possible role of vitamin D in infectious diseases like COVID-19 is explained by its regulatory role on acquired and innate immunity (
33). Evidence also indicated that vitamin D might help in the treatment of COVID-19 by preventing the cytokine storm and subsequent ARDS which is commonly the cause of mortality (
29,
34).
The pooled estimate showed that subjects with VDD were 80 % more likely to acquire COVID-19 infection (OR = 1.80; 95% CI: 1.72, 1.88), which is in line with the previous meta-analysis where vitamin D deficiency or insufficiency participants were at increased risk of COVID-19 infection (OR = 1.43, 95% CI: 1.00–2.05) (
35). Besides, Ilie et al. reported that vitamin D levels are severely low in COVID-19 positive individuals and found a negative correlation between levels of mean vitamin D and COVID-19 infection (
11).
This review showed that improving vitamin D status in the general population has a potential benefit in reducing the risk of acquiring COVID-19 infection. Evidence by Chandran et al. also recommends supplementation of vitamin D in patients with COVID-19 (
36). A meta-analysis of randomized controlled trials (RCTs) concluded that the use of vitamin D supplements was associated with lower mortality in adults (
37). A systematic review and meta-analysis on the effect of Vitamin D on ARTI reported that there is an inverse non-linear association between 25(OH)D concentration and risk of ARTIs (
38). The evidence presented in this review showed promise for the use of Vitamin D supplementation to reduce the risk and severity of COVDI-19 infection.
Limitation of the Study
Our study has some strengths and limitations. The main strength of the current review lies in our adherence to international standardized guidelines on the conduct and reporting of systematic reviews. We included studies only from peer-reviewed journals, which may have restricted our findings. However, some of the limitations of our study include; most of the included studies were hospital-based studies and the data were from secondary sources that become more prone to high risk of bias.
Go to:
Conclusion
In conclusion, low serum 25 (OH) Vitamin-D level was significantly associated with a higher risk of COVID-19 infection. The limited currently available data suggest that sufficient Vitamin D level in serum is associated with a significantly decreased risk of COVID-19 infection. Besides, further rigorous studies are needed to strengthen the evidence.