Safety of a 4-Dose 20-Valent Pneumococcal Conjugate Vaccine Series in Infants: A Randomized Trial.

Background And Objectives: The 20-valent pneumococcal conjugate vaccine (PCV20) was developed to expand protection for pneumococcal disease. It contains all 13-valent pneumococcal conjugate vaccine (PCV13) components plus conjugates for 7 additional serotypes. Our primary objective with this study was to evaluate PCV20 tolerability and safety.