Figure 1.

Reaction of human SARS-CoV-2 spike protein monoclonal antibody with spike protein and different bacterial and viral antigens, including DTaP and BCG vaccines. At 3SD above the OD of background or 0.27, significant reaction between spike protein antibody and bacterial and viral antigens was observed. Each determination of antigen-antibody reaction was performed in quadruplicate. The standard deviations (SDs) for all the reactions were less than 0.1, and are shown as error bars. In these experiments, when monoclonal anti-SARS-CoV-2 antibodies were replaced with sera from healthy subjects, non-significant reactions with a mean of 0.25 were observed from the sera with spike protein. Percentages of significant reactivity are shown. DTaP is shown to be the most reactive. * = Antigens whose reactions were under the cutoff and/or close to the blank.