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Rotavirus-specific immunoglobulin A (RV-IgA) geometric mean concentration (U/mL) among all, seropositive, and seroconverted children at week 18 of life. Dashed line represents 20 U/mL, the threshold for seropositivity. Seroconversion was defined as week 18 RV-IgA ≥20 U/mL with week 6 RV-IgA <20 U/mL. Abbreviations: CI, confidence interval; GMC, geometric mean concentration.
