No abstract available
Publication types
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Research Support, Non-U.S. Gov't
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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Blood Donors / statistics & numerical data
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Child, Preschool
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Epidemics*
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Hong Kong / epidemiology
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Humans
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Incidence
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Infant
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Infant, Newborn
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Influenza A Virus, H1N1 Subtype / immunology*
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Influenza, Human / epidemiology*
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Influenza, Human / immunology*
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Influenza, Human / transmission
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Middle Aged
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Models, Biological*
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Outpatients / statistics & numerical data
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Population Surveillance / methods*
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Seroepidemiologic Studies
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Time Factors
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Young Adult