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. 2021 Mar 24;6(2):e00988-20. doi: 10.1128/mSphere.00988-20

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FIG 3 — Serum antibody enzyme-linked immunosorbent assay (ELISA) for IgM, IgA, IgG1, and IgG2 isotypes binding to plate-bound serovar Hardjo 203 whole-cell sonicate antigen at weeks 0, 4, 13, and 33 postvaccination and postinfection (PI) weeks 4 and 10 (shaded bars). Mean (n = 6) + SEM. An asterisk (*) indicates statistical difference from week 0 within vaccine group; a indicates statistical difference between control and vaccine groups within time point (week); P ≤ 0.05. (A, B, C, and D) y axis scales are not all equivalent.