No abstract available
MeSH terms
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Aged
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Antibodies, Viral / blood
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Child
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Disease Outbreaks*
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Humans
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Incidence
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Influenza A Virus, H1N1 Subtype* / immunology
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Influenza, Human / diagnosis
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Influenza, Human / epidemiology*
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Influenza, Human / immunology
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Influenza, Human / virology
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Seroepidemiologic Studies
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United Kingdom / epidemiology