Figure 4.

MDM were incubated for 16 h in the absence (none) or in the presence of 10 nM of SARS-CoV-2 spike protein supplemented with 2 µg/mL Polymyxin B (S1). The amount of the indicated cytokines was measured with an ELISA assay, as described in Materials and Methods. Data are means ± SEM of four independent determinations, each represented by the different dots. * p < 0.05, ** p < 0.01 vs. none, with a two-tailed Student’s t-test for unpaired data.