Regarding gut permeability, some taxa differentially increased in COVID-19 patients and were correlated with zonulin concentrations, including Enterobacteriaceae (r = 0.94; p = 0.008), Ruminococcaceae (r = −0.88; p = 0.016), Escherichia-Shigella (r = 0.88; p = 0.016), Peptoniphilus (r = 0.77; p = 0.05), and Intestinimonas (r = −0.92; p = 0.011) (Figure 6B,C). The gene discussed is HP; the disease is COVID-19.