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Related Concept Videos

Cancer Prevention02:59

Cancer Prevention

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Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
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Preventive healthcare services keep people healthy via frequent check-ups, screening, and counseling. They primarily aid in disease prevention rather than treating an acute or chronic illness. Preventive treatment also keeps individuals productive and energetic, allowing them to work well into their retirement years. Examples of preventive care services include:
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Nursing management of pneumonia involves promoting airway patency, facilitating rest and conserving energy, encouraging fluid intake, maintaining nutrition, and educating patients.
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Experimental Human Pneumococcal Carriage
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PCV20 in pediatric pneumococcal prevention: expanded coverage, remaining challenges.

Nicola Principi1, Alberto Argentiero2, Beatrice Campana2

  • 1Università degli Studi di Milano, Milan, Italy.

Frontiers in Immunology
|January 22, 2026
PubMed
Summary

The 20-valent pneumococcal conjugate vaccine (PCV20) shows promise in preventing pneumococcal disease in children, offering broader serotype coverage than PCV13. However, concerns remain regarding immunogenicity for certain serotypes and potential serotype replacement.

Keywords:
PCV20Streptococcus pneumoniaeclinical effectivenessimmunogenicitynext-generation vaccinespneumococcal conjugate vaccinesserotype replacement

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Area of Science:

  • Pediatrics
  • Immunology
  • Vaccinology

Background:

  • Pneumococcal conjugate vaccines (PCVs) have reduced childhood pneumococcal disease burden.
  • Serotype replacement and variable immunogenicity challenge long-term PCV effectiveness.
  • The 20-valent pneumococcal conjugate vaccine (PCV20) expands coverage to include seven additional serotypes.

Purpose of the Study:

  • To evaluate the potential and limitations of PCV20 for pneumococcal disease prevention.
  • To assess PCV20's immunogenicity and predicted effectiveness compared to existing vaccines.
  • To identify challenges and future directions for pneumococcal vaccination strategies.

Main Methods:

  • Systematic literature search of PubMed, Scopus, and Web of Science up to July 2025.
  • Inclusion of randomized trials, observational studies, systematic reviews, meta-analyses, and official reports.
  • Analysis of immunogenicity data and mathematical modeling for effectiveness predictions.

Main Results:

  • PCV20 generally elicits noninferior immune responses compared to PCV13, with some serotypes showing weaker responses (e.g., 3, 6B, 9V, 19A, 23F).
  • Mathematical models suggest PCV20 could prevent thousands of additional pneumococcal cases annually.
  • Concerns exist regarding breakthrough infections with reduced-dose regimens and potential serotype replacement.

Conclusions:

  • PCV20 represents a significant advancement in pneumococcal prevention but is not a complete solution.
  • Optimal vaccine schedules (e.g., 3+1 regimen) and continued surveillance are crucial.
  • Development of next-generation, higher-valency vaccines is essential for sustained protection.