[[[ Background: ]]] To investigate whether a delay in infant immunization is associated with the number of older siblings. [[[ Methods: ]]] A cohort analysis of cumulative immunization uptake in 616 children aged 1-4 years recruited for a case-control study of atopic dermatitis in Norwich, UK was performed. The main outcome measures were the age of third pertussis and MMR immunizations. Delayed immunization was defined as a pertussis immunization age 6 months or greater, and MMR immunization aged 16 months or greater. [[[ Results: ]]] Having a larger number of older siblings was associated with a delay in pertussis immunization (6.2 per cent for children with no older siblings versus 23.3 per cent for children with two or more older siblings), but not in MMR immunization. [[[ Conclusion: ]]] Infants with older siblings are at greater risk of pertussis infection from intrafamilial contagion yet are less likely to be immunized on time.
Infant immunization and family size
유아 예방접종과 가족 규모
[Category] 백일해,
[Article Type] journal-article
[Source] pubmed
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