Figure 3.

The homologous OC43 peptide OC43-QL11 was recognized better than the SARS-CoV-2 peptide SCoV-DL11. 17 T-cell lines that responded to SCoV-DL11 were tested for recognition of SCoV-DL11 and OC43-QL11 in a γ-IFN ELISpot. 50µl of each T-cell suspension were stimulated with either SCoV-DL11 or OC43-QL11 at a final peptide concentration of 20µg/ml. T-cell suspension without addition of peptides were used as negative controls to determine background responses. Shown are SFUs after subtraction of background. *** Wilcoxon Matched-Pairs Signed Ranks Test: p < 0.001.