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Immunogenicity in mice of individual components of PLVF—five Ac3-S-LPSs from S. flexneri 1b, 2a, 3a, Y, and 6. (a) Total IgG responses after vaccination with a dose of 25 or 50 μg, (b) IgM responses after vaccination with a dose of 25 or 50 μg. Results shown as mean ± SD. Significant difference between control and experimental group values is indicated (* p < 0.05).
