No abstract available
Publication types
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Letter
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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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Antibodies, Viral / blood*
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Case-Control Studies
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China / epidemiology
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Female
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Humans
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Influenza A Virus, H1N1 Subtype / immunology*
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Influenza Vaccines / immunology
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Influenza, Human / epidemiology*
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Influenza, Human / virology
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Male
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Risk Factors
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Surveys and Questionnaires
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Young Adult
Substances
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Antibodies, Viral
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Influenza Vaccines