We also quantified the increased NETs in the plasma of the female patients with COVID-19 in the same way by measuring the circulating cell-free DNA (205 ± 109.4 vs. 53.1 ± 33.3 ng/mL in healthy controls) and MPO activity (637.5 ± 104.6 vs. 286.9 ± 44.7 U/L in healthy controls). This evidence concerns the gene MPO and COVID-19.