With regards to the des-Arg9-BK plasma concentrations, we verified a significant higher (p < 0.05) mean concentration among 18 patients in COVID-19 group (786.3 ± 658.4 pg ml−1) than in 18 volunteers on the control group (246.0 ± 157.5 pg ml−1). The gene discussed is KNG1; the disease is COVID-19.