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The 20-valent pneumococcal conjugate vaccine (PCV20): expected added value
Esther Janssens1, Johan Flamaing2,3, Corinne Vandermeulen3,4
1Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium.
Acta Clinica Belgica
|February 16, 2022
Summary
The investigational 20-valent pneumococcal conjugate vaccine (PCV20) shows promise in reducing pneumococcal disease burden. PCV20 covers serotypes causing significant disease, offering broader protection than current vaccines.
Area of Science:
- Immunology
- Epidemiology
- Vaccinology
Background:
- Existing pneumococcal vaccines (PCV13) have reduced disease but gaps remain for non-included serotypes.
- Serotype replacement has led to increased disease burden from serotypes targeted by PCV20.
- There is an unmet need for broader serotype coverage to further decrease pneumococcal disease.
Approach:
- A literature search was conducted to identify relevant publications and surveillance reports.
- The review focused on the effectiveness, safety, and epidemiological impact of pneumococcal vaccines.
- Data on serotype distribution and disease dynamics post-vaccination were analyzed.
Key Points:
- PCV20-targeted serotypes cause a substantial proportion of invasive pneumococcal disease (IPD) in Belgium (71.4%) and Europe (37.6%).
- In Belgium, PCV20-non-PCV13 serotypes accounted for 39.2% of IPD cases.
- PCV20 is well-tolerated in vaccine-naïve adults and demonstrates a strong immune response.
Conclusions:
- PCV20 has the potential to prevent more pneumococcal disease in children and at-risk adults compared to existing vaccines.
- Promising safety and immunogenicity data exist for PCV20.
- Further research is required on vaccine effectiveness, immune response duration, and potential serotype replacement post-PCV20 introduction.
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