Recent work has demonstrated that plasma antibodies from patients who have recovered from COVID-19 exhibit proteolytic activity in the hydrolysis of both the S-protein and peptides derived from the RBM and RBD epitopes of SARS-CoV-2 [48] As a result, proteolytic cleavage of two epitopes corresponding to the RBD by antibodies is shown. Here, PROS1 is linked to COVID-19.