No abstract available
MeSH terms
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Adolescent
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Adult
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Age Distribution
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Aged
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Child
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Child, Preschool
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Disease Outbreaks*
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Europe / epidemiology
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Female
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Humans
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Infant
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Influenza A Virus, H1N1 Subtype / classification
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Influenza A Virus, H1N1 Subtype / isolation & purification*
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Influenza, Human / epidemiology*
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Influenza, Human / virology*
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Male
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Middle Aged
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Population Surveillance
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Prevalence
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Seasons
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Seroepidemiologic Studies
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Young Adult