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Relative antibody titers for protein and CPS antigens in the LEPS(20V)/PncO dose escalation study. CD-1 mice were vaccinated subcutaneously with LEPS(20V)/PncO at 34 μg (a), 68 μg (b), and 136 μg (c) of PncO. Error bars represent the 95% confidence interval from four biological replicates.
