Clinical trials consistently demonstrate that catch-up vaccination schedules for pneumococcal conjugate vaccines are safe, well tolerated, and immunogenic in children who missed initial doses.
The retrieved literature includes multiple clinical trials (such as papers 5, 7, 8, and 10) explicitly evaluating catch-up vaccination regimens for pneumococcal conjugate vaccines across various age groups. These studies uniformly report that catch-up schedules are safe, well tolerated, and elicit robust immune responses, directly supporting the claim.