No abstract available
MeSH terms
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Adolescent
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Adult
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Antibodies, Bacterial / blood
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Corynebacterium diphtheriae / immunology
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Diphtheria / epidemiology
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Diphtheria / immunology
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Diphtheria / prevention & control*
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Diphtheria Toxoid / immunology*
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Humans
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Immunization, Secondary*
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Time Factors
Substances
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Antibodies, Bacterial
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Diphtheria Toxoid