Measles, mumps and rubella immunization at nine months in a developing country

B D Schoub1, S Johnson, J M McAnerney

  • 1National Institute for Virology, Sandringham, South Africa.

Insights

A measles, mumps, and rubella (MMR) vaccine showed similar safety and effectiveness in 9-month-old and 15-month-old South African children. This suggests MMR vaccine could replace the current measles vaccine at 9 months, offering broader protection.

Area of Science:

  • Pediatrics
  • Immunology
  • Vaccinology

Background:

  • Measles vaccination is typically administered at 9 months in South Africa.
  • The introduction of a combined measles, mumps, and rubella (MMR) vaccine could potentially enhance public health benefits.
  • Evaluating the immunogenicity and safety of MMR vaccine in infants is crucial for policy decisions.

Purpose of the Study:

  • To compare the antibody responses and reactogenicity of an MMR vaccine in 9-month-old versus 15-month-old black South African children.
  • To assess the feasibility of replacing the routine 9-month measles vaccination with an MMR vaccine.

Main Methods:

  • A comparative study involving two age groups of black children (9-month-olds and 15-month-olds) in South Africa.
  • Measurement of antibody responses to measles, mumps, and rubella components post-vaccination.
  • Assessment of vaccine reactogenicity (side effects) in both age groups.

Main Results:

  • The measles antibody response was marginally better in the 15-month-old group.
  • No significant differences in antibody responses to mumps and rubella components were observed between the groups.
  • Vaccine reactogenicity was comparable across both age groups, indicating similar safety profiles.

Conclusions:

  • A trivalent measles, mumps, and rubella vaccine can be safely and effectively administered at 9 months of age in this population.
  • Replacing routine 9-month measles vaccination with MMR could offer improved herd immunity against rubella and reduce mumps complications.
  • The cost-effectiveness of using an MMR vaccine warrants consideration for public health policy in developing countries.

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