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A trial to evaluate the safety and immunogenicity of a 20-valent pneumococcal conjugate vaccine in populations of adults ≥65 years of age with different prior pneumococcal vaccination

VaccinationVaccinologyVaccine SafetyPreventive MedicineVaccine SurveillanceVaccine TestingAdults ≥65Vaccine EfficacyInfection ControlVaccine HesitancyMedicineVaccine Research