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- W4242104065 abstract "BACKGROUND AND OBJECTIVE Premature infants have a higher risk of invasive pneumococcal disease and are more likely to have lower vaccine responses compared with term infants. Increasingly, immunization schedules are including a reduced, 2-dose, pneumococcal conjugate vaccine priming schedule. Our goal was to assess the immunogenicity of 3 commonly used 13-valent pneumococcal conjugate vaccine (PCV13) priming schedules in premature infants and their response to a 12-month booster dose. METHODS Premature infants (<35 weeks’ gestation) were randomized to receive PCV13 at 2 and 4 months (reduced schedule); 2, 3, and 4 months (accelerated schedule); or 2, 4, and 6 months (extended schedule). All infants received a 12-month PCV13 booster. Serotype-specific pneumococcal immunoglobulin G (IgG) for PCV13 serotypes was measured by using enzyme-linked immunosorbent assay 1 month after the primary and booster vaccinations. RESULTS A total of 210 infants (median birth gestation, 29+6 weeks; range, 23+2–34+6 weeks) were included. After the primary vaccination, 75% (95% confidence interval [CI], 62–85), 88% (95% CI, 76–95), and 97% (95% CI, 87–99) of participants had protective antibody concentrations for at least one-half the PCV13 serotypes for the reduced, accelerated, and extended schedules, respectively. After the booster vaccination, participants receiving the extended schedule had significantly lower (P < .05) geometric mean concentrations compared with reduced (for 9 of 13 serotypes) and accelerated (for 4 of 13 serotypes) schedules, but nearly all participations, regardless of schedule or serotype, had seroprotective IgG concentrations. CONCLUSIONS A reduced priming schedule of PCV13 resulted in higher post-booster IgG concentrations but lower post-primary concentrations. The optimum vaccine schedule for preterm infants will therefore depend on when they are most at risk for invasive pneumococcal disease." @default.
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- W4242104065 date "2018-04-01" @default.
- W4242104065 modified "2023-09-28" @default.
- W4242104065 title "Schedules for Pneumococcal Vaccination of Preterm Infants: An RCT" @default.
- W4242104065 doi "https://doi.org/10.1542/9781610022774-schedules" @default.
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