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Measles vaccination policy

B G Williams1, F T Cutts, C Dye

  • 1Epidemiology Research Unit, Johannesburg, South Africa.

Epidemiology and Infection
|December 1, 1995
PubMed
Summary
This summary is machine-generated.

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Optimal measles vaccination age is 11-19 months, considering maternal antibody decline. Delaying vaccination is preferable to vaccinating too early to prevent future measles epidemics.

Area of Science:

  • Pediatrics
  • Epidemiology
  • Immunology

Background:

  • Measles elimination requires optimal vaccination policies to prevent future epidemics.
  • Maternal antibody presence impacts measles vaccine efficacy, necessitating age-specific vaccination strategies.
  • Current infant vaccination in developing countries may not be optimal due to high transmission rates.

Purpose of the Study:

  • To determine the optimal age for measles vaccination based on maternal antibody decline.
  • To evaluate the impact of vaccination timing on vaccine efficacy and epidemic prevention.
  • To explore the benefits of two-dose vaccination schedules.

Main Methods:

  • Quantitative reappraisal of maternal antibody decline and seroconversion rates by age.
  • Development of an analytical mathematical model incorporating antibody decline data.

Related Experiment Videos

  • Exploration of two-dose vaccination schedules concerning coverage and efficacy.

    • Main Results:

    • Maternal antibody decline follows delayed exponentials with half-lives of 1-2 months.
    • Optimal age for a single measles vaccine dose is 11-19 months, independent of coverage.
    • Late vaccination is preferable to early vaccination if the optimal window is missed.

    Conclusions:

    • Developing countries should consider switching from infant to second-year-of-life measles vaccination.
    • A single-dose strategy optimized for age is crucial for preventing measles epidemics.
    • Two-dose schedules offer benefits primarily for increasing net vaccine efficacy after maximizing single-dose coverage.