Fig. 3: Cross-reactivity of individual IgG and IgA B-cell clones towards SARS-CoV-2 and seasonal human coronaviruses.

a The clonal IgG cross-reactivity patterns of CD19+ B-cells cultured at limiting concentration were determined using B-cell profiling. The mean fluorescent intensity (MFI; range: 1000–65,350) of each clone for each antigen is indicated for pre-pandemic (blue shades) and end-pandemic individuals (red shades). The clone number, total number of reactive clones per antigen, as well as the color-coded donor ID and number of donors with reactive clones, are indicated. b Clonal cross-reactivity patterns of IgA clones are plotted similarly.