Immunogenicity and safety study of 23-valent pneumococcal polysaccharide vaccine revaccination among elderly individuals aged 60-70 years in Shanghai, China.

Front Immunol · 2025 · PMC12311632 · PMID 40746543

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an increasing trendno p-value reported

Conclusion The antibody levels of 60–70 year old people in Shanghai who were inoculated with PPSV23 for 5 years or more showed an increasing trend compared with those before vaccination, but were lower than those in the first vaccination group.

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