No abstract available
MeSH terms
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Adolescent
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Adult
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Carrier State / epidemiology*
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Child
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Child, Preschool
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Chile
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Female
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Humans
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Infant
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Male
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Meningitis, Meningococcal / epidemiology*
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Meningitis, Meningococcal / microbiology
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Middle Aged
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Neisseria meningitidis / isolation & purification