No abstract available
MeSH terms
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Adolescent
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Child
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Child, Preschool
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Disease Susceptibility / immunology
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England / epidemiology
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Haemophilus Infections / epidemiology*
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Haemophilus Infections / prevention & control*
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Haemophilus Vaccines*
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Haemophilus influenzae type b*
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Humans
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Immunization Schedule
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Infant
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Netherlands / epidemiology