PSMD1 and COVID-19: Importantly, the inhibition extents positively correlated with the levels of SARS-CoV-2-S1 anti-RBD IgG antibodies (r = 0.8737, p = 0.0004) (Fig. 1d) as well as the anti-S1 IgG antibodies (r = 0.8457, p = 0.0005) in these COVID-19 patients (Fig. 1e), analyzed by the Pearson Correlation.