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Dental caries after 78 days of infection with S. mutans SJr. The buccal, lingual, occlusal, and total molar caries scores from sham- and SYI-immunized groups are shown. Columns indicate the mean caries scores, and error bars show two standard errors. P values are indicated in each panel where the caries experience of the SYI-immunized group is significantly lower than that of the sham-immunized group.
