No abstract available
Publication types
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Research Support, N.I.H., Extramural
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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 Factors
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Aged
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Antibodies, Viral / analysis
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Child
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Child, Preschool
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Cross-Sectional Studies
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Female
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Hong Kong / epidemiology
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Hospitalization / statistics & numerical data
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Humans
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Influenza A Virus, H1N1 Subtype / immunology
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Influenza A Virus, H1N1 Subtype / isolation & purification
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Influenza A Virus, H1N1 Subtype / pathogenicity*
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Influenza, Human / mortality*
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Intensive Care Units / statistics & numerical data
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Male
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Middle Aged
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Neutralization Tests
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Outpatients
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Pandemics*
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Patient Admission / statistics & numerical data
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Population Surveillance*
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Seroepidemiologic Studies