Measles Antibody Levels in Young Infants

作者: Michelle Science , Rachel Savage , Alberto Severini , Elizabeth McLachlan , Stephanie L. Hughes

DOI: 10.1542/PEDS.2019-0630

关键词:

摘要: BACKGROUND: Infants are often assumed to be immune measles through maternal antibodies transferred during pregnancy and, in many countries, receive their first measles-containing vaccine at 12 15 months. Immunity may wane before this time measles-eliminated settings, placing infants risk for and complications. We investigated humoral immunity METHODS: selected sera collected a tertiary pediatric hospital from RESULTS: Of 196 infant sera, 56% (110 of 196) were boys, 35% (69 with underlying medical conditions. In the month, 20% (5 25) had below protective threshold, which increased 92% (22 24) by 3 By 6 months, all titers threshold. multivariable analysis, age was strongest predictor susceptibility (odds ratio = 2.13 each additional month increase; 95% confidence interval: 1.52–2.97). CONCLUSIONS: Most susceptible months elimination setting. Our findings inform important policy discussions relating timing dose postexposure prophylaxis recommendations.

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