S100A7 and infection: In most instances, the AMP expression of COVID-19 patients did not correlate with clinical features (e.g., age, sex, and course of infection), except for S100A7 mRNA expression (r = 0.33, p = 0.033) and LL-37 mRNA expression (r = 0.32, p = 0.032), which positively correlated with Ct-values at baseline levels.