No abstract available
MeSH terms
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Adolescent
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Adult
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Age Factors
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Bordetella pertussis / isolation & purification
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Child
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Child, Preschool
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Denmark
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Female
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Humans
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Infant
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Male
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Middle Aged
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Pertussis Vaccine / therapeutic use*
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Retrospective Studies
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Time Factors
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Vaccination
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Whooping Cough / epidemiology*
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Whooping Cough / prevention & control*