Figure 4

Quantitative mRNA of Pattern Recognition Receptors (PRRs) in circulating leukocytes of patients with COVID-19 during hospital stay. Expression of PRRs (mRNA) was measured in circulating leukocytes. Blood samples were collected every five days as feasible during hospitalization. The difference between COVID-19 MILD (N = 17 patients) and COVID-19 SEVERE (N = 24 patients) TLR3 and TLR4 mRNA expression at admission widened during follow up. Controls are also shown (17 patients). P values were calculated using the nonparametric Kruskal–Wallis test in R software (version 4.0.3 for macOS).