No abstract available
MeSH terms
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Antibodies, Viral / blood*
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Disease Outbreaks / statistics & numerical data*
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Humans
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Immunoglobulin G / blood*
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Influenza A Virus, H1N1 Subtype / immunology*
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Influenza, Human / epidemiology*
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Influenza, Human / virology*
Substances
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Antibodies, Viral
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Immunoglobulin G