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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Age Distribution
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Europe / epidemiology
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Humans
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Influenza A Virus, H1N1 Subtype*
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Influenza, Human / diagnosis
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Influenza, Human / epidemiology*
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Influenza, Human / virology
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Pandemics
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Population Surveillance
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Risk Factors