For example, in 93 patients with COVID-19-related pneumonia, Saponaro et al. [37] found a similar inverse correlation between 25(OH)D and CRP (r = −0.21; p = 0.04), as in our study; however, no significance was observed in the crude correlation of 25(OH)D with TNF-alpha. This evidence concerns the gene CRP and susceptibility to pneumonia measurement.