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Pneumococcal conjugate vaccines (PCV) have significantly reduced invasive pneumococcal disease (IPD) and are crucial for diagnosing inborn errors of immunity (IEI). Further research is needed to assess immune responses beyond serotype levels.

Keywords:
Adverse effectsimmunization schedulepneumococcal vaccinesvaccine efficacy

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Area of Science:

  • Immunology
  • Vaccinology
  • Infectious Diseases

Background:

  • Streptococcus pneumoniae causes mild to severe infections, including invasive pneumococcal disease (IPD).
  • Early polysaccharide vaccines lacked immunologic memory; protein-conjugated pneumococcal conjugate vaccines (PCV) were developed in 2000.
  • PCV advancements have reduced IPD morbidity and mortality, aiding inborn errors of immunity (IEI) diagnosis.

Purpose of the Study:

  • To review the impact of pneumococcal vaccines on IPD and IEI.
  • To highlight the current limitations in assessing vaccine-induced immune responses.

Main Methods:

  • Literature review of pneumococcal vaccines and their clinical applications.
  • Analysis of the role of PCV in IPD prevention and IEI diagnosis.
  • Discussion of immune response measurement techniques.

Main Results:

  • PCV have significantly decreased IPD incidence and mortality in high-risk populations.
  • Pneumococcal vaccines are vital for diagnosing and immunophenotyping IEI.
  • Current clinical assessments primarily focus on serotype quantification.

Conclusions:

  • Pneumococcal vaccines have transformed IPD management and IEI diagnostics.
  • Comprehensive immune response evaluation (functional activity, avidity, memory) is limited to research settings.
  • Further development is needed to integrate broader immune response measures into routine clinical care.