Time frame: Before,1 month after 13vPnC (Year 0), 1, 2, 3, 4 years after initial vaccination (Year 0); before,1 month after 13vPnC (Year 5)
Serotype-specific OPA GMTs for the 13 pneumococcal serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F) were determined in the blood samples of participants using a microcolony OPA (mcOPA) assay. GMT (13vPnC) and corresponding 2-sided 95% CIs were evaluated. Geometric means were calculated using all participants with available data before, 1 month after 13vPnC (Year 0), at Years 1, 2, 3 and 4 after initial vaccination (Year 0), before, 1 month after 13vPnC (Year 5) blood draws. CI for GMT were back transformations of a CI based on the Student t distribution for the mean logarithm of the titers. n=participants with valid and determinate assay results for the specified serotype at before, 1 month after 13vPnC (Year 0), at Years 1, 2, 3 and 4 after initial vaccination (Year 0), before, 1 month after 13vPnC (Year 5) blood draws.