No abstract available
Publication types
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Clinical Trial
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Clinical Trial, Phase III
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Multicenter Study
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Child, Preschool
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Cohort Studies
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Humans
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Infant
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Italy / epidemiology
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Pertussis Vaccine / pharmacology*
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Whooping Cough / epidemiology
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Whooping Cough / prevention & control